inevitable byproduct of encounters with keys and coins
Not with my phones they aren't - even (especially, due to weight?) with the old Nokia bricks I used to have, my valuable electronics have always been isolated from any issues like this by having a pocket dedicated to holding them, and nothing else.
Coins, keys etc can go in the other side, thankyouverymuch.
Rear pockets are also a no-no, for obvious reasons.
Honestly, did anyone think this was really glass on the screen? It's not known for being particularly flexible, unless it's a strand of optical fibre thickness, and they are not known for being particularly strong.