I mean I don’t know who this person considers “young” but this has been a problem on the left for a while. It’s the whole “let people have fun” mentality that has been a slogan of radlibs since at least the time I was in college. I think it grows out of the whole 2000s/early 2010s zeitgeist when everyone had an overwhelmingly libertarian philosophy, some being more social in orientation, and some being more conservative, though even those conservatives had their “socially liberal, fiscally conservative.” There’s a usefulness to social libertarianism, but at one point you need to decide if you fall down more on the social side of that, or the libertarian side.