Guys just place yourself in position of the team XD
You practice specific comp, you practice specific set plays, you use your time (you dont have that much of it) to practice and be good on something
And then someone bans the crucial agent you need in your comp
Basically the games would be much worse quality because of lack of preplanned gameplay and lack of practice by the teams
You can say that would benefit versitile team but its not like they dont practice, if they practice 2 or 3 comps instead of one that they play they cant be that good on all of them