This is 100% only for maximizing desk space for low sensitivity aiming, and anyone else that does it for any other reason is just copying pros and lying about their reason. Its mot for ergonomics. It doesnt make keys easier or faster to press. All it does is give the mouse more desk space to move around on.
I never understood how better equipment that is more ergonomically centric isn’t something many eSports enthusiasts invest it especially at a professional level. Looking at that hurts.
Because they’re kids, and probably poor too. When I was younger I played so much CS 1.6 that I seriously considered going pro. The setup I had then would probably literally kill me now, but when I was a teenager I didn’t feel it at all. I could work with anything so long as I had my trusty MX518.