Thank you! My interpersonal insight was ten points too low. That hurts lol but at least now I know what the issue is.
It's actually 275, and even MCs that specialize in people/politics knowledge would need to grind a bit to get there!
Considering how busy you can get trying to get the secrets to the legendary endings, I definitely recommend getting the practice in earlier than week 6. I ended up 5 points short of it myself, and had to load up a save two weeks earlier because I didn't have enough free time slots, RIP.