Don't get caught up in the Hinkie mythology.
He drafted multiple busts before drafting Embiid, and Joel was the third member of a three-player draft. There's no way of knowing if Hinkie would've taken him first overall or if he would've taken Jabari or Wiggins instead. Hinkie's biggest trade win was getting the SAC pick and swap. The swap apparently didn't end up mattering (I could've sworn that it had), so the Sixers took Simmons. I don't think that would've changed under Hinkie, as he was one of seemed to firmly believe shooting could be taught given their other picks. In the Fultz draft, Boston specifically agreed to the trade because the Sixers told them they weren't going to draft Tatum. Philly was basically going to end up with Fulz no matter what.
Hinkie sucked at drafting and building a team. He was great at making trades, though he burned a lot of good will in how he did it. The two most successful Philly draft picks are both deeply flawed players. At best, Hinkie might've tricked some team into giving good value for them. But I don't think he'd've been able to pivot the team into a winner.