It's because they're not comfortable admitting they are on the skill floor. That's pretty much it.

It's literally just insecurity. Most of those kinds of people can't wrap their heads around the fact that there are people whose hobbies is to feel the dopamine rush of mastering an aspect of their hobby, whether that's sports, art and crafts, or video games. They can't understand that having room for a skill ceiling won't affect them. They get intimidated by it, and they feel forced to reach for it, when they don't have to.

They see a slam dunk on NBA, go to the court, try to dunk and get shat on, and then they leave and mumble that "basketball is stupid, sports are stupid, holding the ball while walking should be allowed etc.. etc.."