There is a lot of misunderstanding on this thread. And scary assumptions.
Carers aren't put in a position of authority over a 'service user'. Being disabled or elderly does not mean that your status as a grown adult are taken away. That would be disgusting.
Carers aren't jailors, parents, police, nannies, school teachers, etc etc etc. They help people live as independent adults when that person can't do everything for themselves, whether from a physical or mental illness, or old age etc.
People don't become children/ infantilised, or somehow sub human although that's the way they're often treated.
Adults who rely on carers are still people who make decisions for themselves. Just because you could physically force them to submit to your will, in no way means you should.
Adults make decisions other people disagree with all the time. Unless the decisions are illegal, there is no God given right to intervene just because you think you know better. If you want this to be different you either believe disabled people shouldn't have the same rights to govern themselves and futures as non disabled people, or maybe you believe that the state should criminalise certain lifestyle decisions that effect no one but the individual concerned? So, we must criminalise smoking, going to bed after 10pm, not eating 5 a day, eating more than 1g salt a day, and where exactly does it stop?
I know people think they're empathising by setting out scenarios like, 'if my child was in that position'.... But that's thinking about a relationship with dependence already acceptable. What about making it a tad more personal?
What about if YOU were the one needing carers? Not a dependent, not someone who you can imagine needs someone watching over them, but you. And not you in 50 yrs or a different you somehow, but You just as you are now, except you can't walk, or sit up, or maybe you can't get out of bed. Or maybe you can't get out of the house. For example, maybe you've had an accident and broken your back.
You with your opinions, independence, dignity and self, needing to rely on others. Then carers who are not qualified, don't know you, have no idea of your medical history, values, background, profession, family, beliefs, ... Often a different person every day, who is rushed, and doing a low paid job where they get treated badly themselves, and can resent any extra work or effort.
And those people are allowed, perhaps encouraged, to make unilateral snap judgements about you and your needs. And that carer decides your voice, your opinion, your self agency, doesn't matter as much as their own opinion. And they get to impose their ideals and judgements on you, as you can't walk. You can't over rule them, as you are dependent on them. They can physically dominate you. They can control you.
That decision could be theoretically good for you or maybe terribly bad for you. Doesn't matter, disabled people aren't in charge of their own lives anymore. They are no longer equal to other people.
So, You could get a carer who 'doesn't believe' in Halal food, vegetarianism, eating carbs after 6pm, having a drink with a meal, an allergy, alcoholic drinks, soft drinks, or maybe they force you to eat broccoli, though it makes your stomach bloat and hurt all night, etc etc etc, and this happens to you and society is fine with it, because that's who you are now.
How you feeling now? Forced to submit to someone else's regime just because your back don't work (for example).
Well it doesn't matter how you feel anyway, your opinions are nothing. You have no voice, no independence, no self agency. And that's because you aren't a 'proper person' anymore, you are dependent. Your carers can make you live anyway they want. And that's the way society wants it to be, glad someone else is taking care of the problem.
And that's just food, what about other things, like taking medicines that give you side effects, or that the doc has changed but the carers don't know this? And you want/ need to come off them. But you can't as no one wants to hear your opinion, you do as you are told. We know best. Be quiet. Be good.
You want to decide when you go to bed? When you need to use the loo? What medicines you take? When you sit up, or stand up, when you're naked, or clothed, when someone spends your money, or not, when you're allowed your phone, or any tv, when the lights are on, or when you have to sit in the dark... All these things 'normal' adults get to decide. They have self agency, independence, their bodies, homes, resources belong to themselves.
And what about choices that are central to your sense of ethics, or self identity? A carer may decide it's not important to them, so you don't need to do it anymore. Or maybe they disagree, and once again you are in no position to get anyone to do what you want, as you are over ruled. So.., no you can't wear a veil, or vote, or talk to a doctor on your own.... It could be anything, as it's not you who matters anymore. Maybe you're lucky and the carers ideals align with yours. Or they care how you feel. That tgeyre not rushed, stressed, under paid, put upon. But maybe they won't be like that. And it doesn't matter as you cant insist on it.
But in the world you seem to want, as soon as you get ill or disabled (or have one too many birthdays)... All these basic things get taken off you, in favour of at best an infantilising paternalistic type of indulgence. Or a hideous living death.
And that scenario, is only ever ok from one side, that's from the position of power.
I became disabled a few years ago and I am bloody glad my rights to be allowed to be a 'proper person' are enshrined in law. There are many people who would like disabled people to vanish, other people's rights are inconvenient, and get in the way of efficiency as well as other people's desire to make the world the way they want, in their own image for instance. I know as I have experienced first hand, that if I didn't have the same human rights as anybody else, I would be abused, violated and stripped off dignity, humanity and anything good.