We are talking football. You are talking logic. You are wrong about football no matter how many times you repeat it. The language error that you are making, if you want to be pedantic, is that skill positions in football are a label, same as if they said they were blue positions or fluffy positions. There is no opposite of either - it's just a label. You are misinterpreting that skill must mean there is a no-skill or less-skill, when all it really means it whether they are expected to touch the ball often or not.
Chess is a more complicated game than checkers. There are many more mathematical permutations, and assigning skill to the two disciplines can be compared and contrasted. Trying to do the same between sports runs down a path that ends with a whole bunch of unfounded and uninformed opinion, typically by one who is deep in one sport but not the other - doesn't matter which sport is which.