Many parents, usually mums, will chose to work part time or not at all. I don’t have that choice - or certainly didn’t until very recently and even then it relies on a very flexible employers to make it work.
My DD is 14, she still needs supervision after school, in fact her school transport won’t drop her off unless they physically hand her over to another adult. There is literally no after school childcare for kids over 14, so I need to be home. My job allows me to work from home, but if it didn't I’d need to reduce my hours. That’s a necessity, not a choice.
While many mums will work part time, it’s not normal to be dealing with repeated night wakings for older children, interrupting sleep with a knock on effect to the next day.
In the absence of disability I could chose what my kids eat in the road, bring a picnic or buy a sandwich for much less (and be more healthy than) McDonalds. McDonalds is literally the only safe food for my DS out of the house, so it’s that or nothing - not a choice.
One of the difficult things for parents of disabled kids is the “every child does X” or “I have that too”, very often it’s not the action or event itself that denotes additional need, it the frequency and severity, and the cumulative impact of it all happening at once, most days. Most people will have some quirk with their kids but multiple challenges all at once, consistently and constantly is a very different thing.
Luckily for you, you don’t need to identify the point at which normal care or need tips into something more - the government have done it for you.