I think this is less an argument for how much skill is involved in DFS - there is, but how slim the chances are for recreation players to win against the pros. This seems like a scam for recs who stand no chance.
Probably the better comparison would be how likely an amateur is to win against the world backgammon champion. Backgammon has some luck in it with dice rolls, but if the skill difference is big enough luck has a much tougher time making any difference.