Tanks win games, more tanks, more wins.

Literally the title. If you have a tank top lane, jungle and support, you are more likely to win against the enemy team who only brought an Alistar to the match. I understand that in the LCS they are able to pick poke comps, 3 ADC's and win. But the problem is with ranked games nobody actually picks a comp. They choose a champ that they want to play and hope they can carry hard enough for it not to matter. So.. The more tanks in ranked games equals more wins. At least that's how most of the games I see or play in happen.