That's what you think is important.

Blind people for example don't care about zoom factors, but they care very much about the fact that they can completely control and use their iPhone using text-to-speech and certain gestures.

Exactly, I bought an android partilly for accessability features. Apples are better intergrted, but much more limited.

I've had a user complain the lack of a physical button on the new iphones making everything a guessing game for the seeing impaired now.

That happened with my Macbook Pro w/ touchbar.

There was an issue with the graphics, and it initially booted into an assistive mode for first-time setup, and I wondered how a visually-impaired person would use the touchbar.