SP has worked with less talented QBs in the past. I mean he did technically improve RW last season compared to Hackett' season. Enough improvement to have the Steelers sign R. Wilson this off season.
Zach Wilson is capable of being an accurate passer if he processes faster and he can throw the ball deep. Both traits that SP covets in QB's.
With R. Wilson's season last year SP has probably helped more QB's reach 3000 passing yards under his tutelage than most NFL coaches in NFL history.
Quincy Carter, Vinny Testaverde, Drew Bledsoe, Drew Brees, and now R. Wilson.
We will see what the Broncos do during the draft but Zach Wilson is not a statue like Vinny, or Bledsoe. And a lot younger than Wilson while being potentially more accurate of a passer than Carter.