That's because at the end of the day:
- accessibility is just usability. all it is is making sure your product is as usable by as many people as possible.
- it's a myth that "people with disabilities" are some other that excludes you, and 'accessibility' or assistive technologies only benefits other people. Everyone is only temporarily 'abled'. You need to use prescription glasses to comfortable read a computer screen? You're a parent trying to watch some TV while getting your child to sleep? All benefit from assistive technologies.
> accessibility is just usability. all it is is making sure your product is as usable by as many people as possible.
Not always. There are things that increase usability for fully abled people but decrease it for disabled people. Color-coding is a common one. Another is using smaller font size to make more info visible at once, or advanced touch gestures that can be accidentally triggered by shaky hands.
Then there are accessibility features that actively harm fully abled users, like sticky keys or screen readers that automatically follow focused UI elements.