Don't take this the wrong way, but it's obvious from this comment that you've never spent any time working with a blind person on an interface. This idea that

Don't take this the wrong way, but it's obvious from this comment that you've never spent any time working with a blind person on an interface. This idea that a blind person would need tactile feedback comes from a sighted person imagining what it would like to be blind, not the experience of actual blind people with buttons vs touchscreens.