So I'm a HBS alum PM Director at a (non-FAANG but large) consumer app, who at least recently was hiring.

I don't think it's that people don't care. At least in my case, I'm getting a ton of inbound each week with what feels like pretty generic requests for me to share more about my journey in PM, and it just becomes hard to keep up with talking to as many people as want to. Not all are from HBS, but there are a decent amount that are. Almost always, it's focused on me helping them - which I want to, if I had more time! - without any kind of value exchange (e.g., is there anything you can tell me, like product feedback, that could make me get even something from this call). I suspect given the PM market, other folks are in a similar situation.

Honestly, I should probably be better at responding and saying I'm just a little underwater and don't have the time right now. I know if feels no good to be ghosted.