The thing is, it isn't that easy to actually train for deadlifting for a couple of years, it assumes dedication, some health requirements and basically is the difference between people who do some sport and people who don't. This is obviously ridiculous comparision to anyone talking about anything but playing Overwatch.
So, sure, this surprising life lesson will turn out to be true if you continue to craft the domains you compare in such way that you match competitive ice skaters vs people who were on the ice rink one or twice, MMA fighters vs guys who were in a streetfight once back at school, etc.
And while I don't play Overwatch, I don't think it's actually different than that, it's just that "people, who both can and want to waste significant portions of their life time in a dedicated attempt to become better Overwatch players" are less than 5% of people, who created an account on the Overwatch server (or whatever).