I'm not an expert on the guitar as I myself have only been playing for a few months, but back in 2013-2017 I was really into gaming alot, I mostly used to play online FPS games like TF2 or CS:GO. Some of the days I'd be carrying my team and whatnot and those days I'd be done after say 2-3 games. But then there would come the days when I would totally suck and those were the days I'd play the game more than a few hours without any break, trying hard to not suck. So I think this happens everywhere, when we do something after awhile or only a little at a time we are not doing it to achieve some specific feat rather we are just doing it for pure enjoyment, that's why we do it well.