You may have the same ruminating anxieties as I.
Social trends used to fade and self-correct. The pendulum would swing. But there are portions of this that are so ingrained, they aren't even questioned. That's just the way it is. So asking about the absurdity is like questioning if the sky is blue. I expected a return to sanity long ago, but no. Even a pandemic didn't change it; that tells you just how deep rooted it is. In the absence of a war on our soil? It's has to be parental and generational. But these people are breeding, so I am not sure.
I don't see it as a mental health issue at all. There is an outcome to eliminating social limits.
People have to police people. Societies have to have standards or there is no society. Once the "society" left the location and went to the cloud (among other reasons), there are no standards because everyone can exist in their thought bubble with the rest of the like-thinkers. We do it to an extent, that's why we have been here all this time.