There are so many features under “accessibility” that have wider usages.
I'm co-owner of an agency that builds websites, and we have a phrase that "accessibility is for everyone". Like you say, there are so many accessibility settings that can make things easier to use for anyone, from simple things like reduced motion to more complex things like colour filters.
i consider it the root menu of the phone
I use the back tap feature for shortcuts and have my iPad auto-answer FaceTime calls when I’m out so I can check in on the dogs.
Lots of neat features hiding beneath the surface!