And?
All PVP games have a meta, but having solo queue injects a lot more players into the stream so those meta groups become the minority rather than being the majority (which are currently thanks to no solo queue.)
For example, in Overwatch (another Blizzard IP) you can solo queue. While triple tank meta was going on and being complained a lot about by people on streams, it rarely happened below a certain rating and there were enough random players to ensure lots of random games.