I tried gestures a few times, but it was constantly seeing me scroll horizontally and taking me back, or scrolling upwards and taking me out of the app. Or, oh man, trying to open a left drawer without navigating away from the page I'm on.
I don't know if I just use devices differently than you, or if I have less patience for things messing up, but honestly I'm glad the work for someone, because otherwise they'd be unusable garbage ๐