Main tanks these days will rarely use LFG or solo queue. They are more likely increase their friend list and only play tanks with their friends because they know they can rely on their friends.
The only tanks you will see these days that solo queue are mostly flex player.
Heck, I rarely tank when I play AI training, even if we’re losing. I play to fool around. However, once I am playing with with my friends, I have no problem flexing for the role. I left QP long ago, and not because I was losing.