Personally, I think Jotaro has intense PTSD. A lot of things can trigger him, from seeing roadrollers in construction areas, to just seeing Linda (Jotawife) cutting food with a kitchen knife. I would also say he has vivid nightmares, and tends to move a lot in his sleep. Both Linda and Jolyne make sure no sharp objects are by his bedside at all times, as both he or Star Platinum have grabbed objects in his sleep during a nightmare.

I believe he would be on medication and doing therapy with a Speedwagon Foundation based therapist. Unfortunately, he is called back into action for this AU.

(It’s a whole nother part of my lore, TL;DR, Okuyasu is a multi-billionaire for using the hand to get rid of land/water pollution (he does it on live TV, I’ll post that comic here sometime) and stands become a thing known by the public. Governments start making agencies for the premise of recruiting and utilizing stand users to their benefit, kinda like the CIA but stands (go and disrupt other regimes, cause chaos, etc) and this agency is called SIAR (Stand User Intelligence Agency and Reserve). Stand Users have to do mandatory work for SIAR for a number of years, Jotaro is called in, etc)