@cockywoof there's alot to reply to there and my house I'd now in full swing so I will reply but it'll drips and drabs.
I agree you wouldn't say that about any other disability and that is where autism should be/ where I would like it to be. Unfortunately it isn't because of people who self ID, people who say autism but mean mh, people who take the piss, parents who would rather get/pay for an autism dx than address other issues, super powers etc. The watering down of the dx means that it isn't perceived as a disability. While you personally may not be taking the micky others do and because the dx isn't clear cut, people do abuse it. This is why people are sceptical and why some are fed up with it being used as an excuse.
I don't believe my son would be denied accomodations he needs. Autism isn't invisible for him, he doesn't need a lanyard. (As an aside there are people in the disability community who detest the sunflower lanyard and don't believe it's helpful, it's incredibly abused and sometimes used as 'look at me, im special' symbol).
My personal feeling is that autism as a dx is now useless. While some understand the requirements for a dx to be made and the areas of life/communication that need to be impacted there is no universal understanding. Autism could be a PhD student with kids, career, home, friends etc or someone with 24 hour severe needs. You couldn't say to someone I have autism and them understand how you present whereas if you say I'm a wheelchair user, your needs ate prety well conveyed.
On the subject of dx. My son was dx'd at two years old with a wait of approx 10 months. Those who have profound or obvious needs don't usually have to wait the same as others where it isn't as clear cut.
The theme of the thread is about why people don't view accomodations for autism the same as maybe other disabilities and I personally feel it's because autism isn't taken seriously any more. The number of people wanting accomodations for it has increased massively because the dx has increased. I can easily see why people get annoyed and think people are taking the micky.
Where you've said I'm not correct in that someone can have kids andsuccessful raise them or a house and manage everything that comes with it but need accomodations in other areas I do see it as absurd. Kids come with stress, responsibility, paperwork, time keeping, safety etc a house comes with shopping, mortgage, cleanin, responsibility. It's absurd that you can manage one without support but not the other.
Personally, I would only give accomodations where people have social work involvement where autism is the reason behind it. In a bid to stop alot of mick taking- not gonna be a popular view but there we go.