hellstarkooturtlewordsLow level players don't often know how to exploit the disadvantages of having these classes, but you can still bet that the team with the cookie cutter classes will win mid more often than the offclass team. If they can win mid more, they will generally win more. It is not a question why they teach them cookie cutter. It is because it will win them games. TF2 isn't really a game of class counters on 5CP. You play the most damaging, fastest, and highest ranged characters if you want to win and press your advantages.
If you are at a disadvantage, then the offclasses can be used effectively in very clear criteria. The offclasses themselves other than sniper don't really require any skill to be used effectively. A heavy or engineer setting up on last, a pyro airblasting the uber on maps like gullywash, a spy backstabbing a medic, or even a sniper sitting in spawn watching an angle, these all don't require much teaching or learning to be effective. .
I agree and respesct ur opinion, i think mine is just more personal sentiment than anything cuz I've been open and playing game on and off for a couple of yrs