Because in russia one bad word in good environment with some kgb buddy might get you a trip to gulag. So everybody was very careful choosing conversation partners and topics. That’s not the way to build strong social cooperation.
It sounds like a form of strong social cooperation to me, just one that no one likes. And since strong social cooperation sounds so good to some people, they start to look to separate it from the strong social cooperation they like, either knowingly or unknowingly, and we end up with a similar situation to the stereotypical "ah, but that wasn't real socialism" socialist, where it just can't be admitted to be anything similar.
I'm a libertarian so I'm already suspicious of such things, makes it easy to spot.