No it's not. It makes no sense to say "oh, you can't commute to work and then home again five times a week? so how do you get groceries?" because those are two completely separate things in completely separate environments.
It's none of Amazon's business how people manage their disabilities outside of work. The only thing that matters is what the most effective way of managing their disabilities is inside of work. Amazon is not your doctor, and if your doctor says that this is the most effective way for you to manage things while being productive then they need to accept that the doctor knows what they're doing.
Part of which is that people face lots of stigma around disabilities still, but also the need to have some historical and diagnoses paperwork is a barrier that I suspect lots of people don't want to go through.
Frankly, I don't believe its rampant to begin with, and I can't find any real evidence that supports that people are widely abusing these accommodation requests.
The entire conversation I have focused on work accommodations. I suppose I thought it was clear.
The bar for getting an accommodation at work has been higher than many other places (like bringing an emotional support animal to a store).
I can't speak to schools, that is also another very delicate social dynamic that has different incentives on how to handle these things than a place of business does.