It's a mixed tactic
While Princeton was supposed to have an inside focus as well... it doesn't. It's no more an inside a tactic than Run and Gun is. Princeton was also supposed to have a decrease in 2pt jump shots, but actually results in an increase over base offense. (someone posted data on this in the bugs forum before).
It's not the only offense that doesn't work as designed. Patient is supposed to be a slow version of Base Offense / Push the Ball... but obviously isn't.
Yes, there are more jump shots than in base offense, and generally fewer inside shots. But inside shots and drives are still taken, especially when those shots fit the players' profile. My last game for example, my PF for the game is a mostly blah center build offensively but with good handling and passing, but atrocious driving and not much JS/JR. He missed one contested jumper (and was fouled on another), but took 6 inside shots (3 contested, 3 uncontested) plus drew two fouls. No drives or threes. Meanwhile, my C, who this week is a PG but will probably be back to SF after training, has much lower IS but has high DR/HA/PA and good JS/JR (especially compared to the C build). He took four regular inside shots (2 contested, 2 uncontested), and four contested drive attempts, vs. 6 jumpers (2 uncontested) and no threes.
I'm heading out so I can't run through all my games against a 3-2, but I have definitely noticed my trainees at least tend to drive and shoot from inside more frequently against that defense, while they'll shoot from outside more often against man to man. At least that's my impression from watching the games live, of course, so it's anecdotal.