It’s a personal preference. Ever since I tried gesture I never went back to buttons. I don’t even need to adjust my hand position to get out of a page and it’s never been a problem until that site has put a different function exactly where my thumb was going to swipe.

Also, such a function you are suggesting would use a different gesture. You would have to swipe from the center-ish of the screen outwards instead of the other way around.

Apple’s gestures though, I can’t stand.