Show me a list of all the great grad transfers we got before Prohm. It starts and ends with Kane. BDJ was good, but didn't end up having a huge impact. Jake Anderson was a l Bowie level player on a bad team. That's it, that's the whole list.
I think you assume grad transfer recruiting is way easier than actually is.
You don't always need high impact players. We were highly successful with guys like Royce White (great player), Korie Lucious, Will Clyburn, Scott Christopherson, Kane, BDJ etc. Theres more than you remember.