An option would be nice, but remember Google started it on Pixel phones long ago and I’m sure people have asked for it to be removed and Google hasn’t.
Has never bothered me though, I think it looks kinda cool.
Oh I guess I misread or wasn’t thinking right, I thought people were talking about the gesture line.
The bottom nav bar is all up to the app developer on how it looks. I think people get confused when it’s black, lol.
On many apps its full color, but the gesture line is always present.