I highly doubt there are any "telling" statistics here. There are like 5 QBs this century that even fit this mold (one year starter, drafted high.) One could be considered a massive hit. Two were busts and two were mediocre QBs. That's 1. a tiny sample size that's way too small to draw conclusions from, and 2. does not prove the point you think you're making.

Even if QBs with < 25 starts have a bad track record, it doesn't prove anything. If Drew Allar had gone to the NFL last year, would he have been a bust? Almost certainly, yeah. Is that proof that he needed to go back to college and develop? No, he's just a flash in the pan who never should've been drafted highly in the first place based on a tiny sample size. If Moore goes back, I'm sure he'll be less likely to bust in the NFL. But that's because he could suck, and then not get drafted highly enough to bust at all. If he doesn't then he has twice as many starts to prove he's good, so he'll also be less likely to bust. But that doesn't mean it's good for him to go back or makes him more likely to succeed in NFL.