Blunt question I know but this is something I found a bit hilarious and baffling because I'm someone that's fairly adaptable as a gamer and for the most part I'm not that bothered about keybindings these days and being able to rebind them. Some people seem to get really bothered about it though and I was seeing on places like steam some absolute sperg sessions about it.
Do you care about this sort of thing? If the layout is pretty normal with WASD and such I don't understand why people would care that much so I'm trying to go out of my way to understand. One repeating trend I saw weirdly was left handed people complaining about it. My argument is this, there's only so many ways one can rebind the keys when it comes to shortcuts, so I can understand doing it for certain actions, but otherwise it seems silly.
There's always peripheral emulation to consider. Like I have a steam controller and sometimes the easiest way to fudge around compatibility issues is to have to touchpad work like a mouse rather than an analogue stick and mess with the bindings.
Likewise my mouse has scrollwheel tilt switches and so many games don't recognize them that I have the default profile set up to make them emulate Z and C key presses so I can just bind them that way.