I think schwap's point was that you can't draw the conclusion "Fantasy games are more games of skill than their professional counterparts" when you're comparing

I think schwap's point was that you can't draw the conclusion "Fantasy games are more games of skill than their professional counterparts" when you're comparing people self-selected to have close to even skill levels (elite athletes) to a random sampling of the population. Of course there's more skill advantage in a random sampling than a sample biased by skill.