It's not really a question of how many taps they support, but how fast.

This same issue also seems like it would prevent you from quickly double-tapping the button to turn an image upside-down, a much more common use case.

Not prevent, just not provide very responsive feedback, right?

I don't know, I understand the principle, but I don't see how you can determine the value of a principle outside of a specific context.

Even for accessibility, we can't target every context in the name of being accessible. We still have to pick which contexts of inaccessibility we'll need to support with more attention.