This is one of those posts that looks so out of place I genuinely can't tell if it's being sarcastic or not.

As unpopular of an opinion as it is on this board, I agree entirely with Robin on this, in that native in-game 6v6 lobbies wouldn't work very well.

And even if the current meta is the one that most rewards player skill, that still isn't enough for Valve to justify enforcing it natively to the game. Crazy strats that change the meta for 6s won't happen because the most skill-based plays with the most skill-based weapons on the most skill-based maps have already been figured out, for the most part. 90% of what's left for teams to do is to improve their communication (which will be almost nonexistent in lobbies anyway, let's face it) and DM to a watertight standard. That makes for a good show for people who want to watch sick frags and get sick frags themselves, but fresh and new strategies are drying up fast.

If 6s lobbies in-game existed they would just be ruined by the lack of communication, not to mention phlog pyros or gunslinger engineers getting easy kills through the lack of consistent banlists. HL only has 10 or so weapons banned at the moment, it would be much easier for lobbiers to make up banlists on the fly for it than for 6s.

And there's only 4 stock maps (badlands, granary, gully, gpit) that are even considered viable to play 6s on at the moment, compared to HL covering most of the stock maps and every active game mode except plr.

Added

My team's server had that for a scrim once because someone tried to play surf maps on it before the game. That first midfight was hilarious.