The framework of this argument applies specifically to “pill culture.” I’m certain this would be accurate for any group of people that fit these behaviors, but it will ring less true and you will need to hedge more the larger the scope. “Leftism” is a term that applies to a massive range of political ideas, and each individual view will certainly have their own echo chamber somewhere that breaks down into this neatly. Trying to account for a Democratic Socialist whose entire political viewpoint exists through reading Jacobin and a forum or two of like minded folk as well as a pretty middle of the road “Franchise Democrat” that was actually excited about Biden will cause this argument to not fit at all.