My most charitable read of that trend is the narrative that everybody is broken and traumatized and if they're not in therapy then they're in denial about their

My most charitable read of that trend is the narrative that everybody is broken and traumatized and if they're not in therapy then they're in denial about their unaddressed issues, and a therapist is the only person who can truly fix you before you bring those issues into a relationship. I'm quite confident that this isn't a thoroughly examined belief for most people espousing it, it's a meme that's supposed to show sophistication as a partner.