Team builder is for the Meta only.

This is true unless if you wait to be kicked for about 50-100 games until you get that one group that actually plays team builder for one of the ideas it was created for. Doing something different.

Seriously, I play team builder so I don't have to have an ADC bot or duo bot. I want some diversity, not the same champions over and over but having the ability to just select the role you want to play (If you are a mid/top good luck finding a game)