Queuing with others is an advantage, so why is it hidden from everyone in the game?

The information of who in your game is queued together is far more beneficial to solo players who deserve to have that information, than it is for the premade themselves. If you as a solo player are laning against a member of a premade, they were most likely going to cheese you regardless of whether or not they knew you were solo. You however, are far more prepared to counter it if you know they're premade than if you didn't. Aside from just the solo players benefiting, your whole team may play more aware when they know they're facing a premade. Hiding this information only makes cheese strats easier for the premade. They already get the advantage to start with so we should at least be informed.