The the Saints offensive line has sidelined 4 to 5 starting Saints QBs in the last 4yrs.

5 1st round picks on that line.
First round picks are not guaranteed to transition to pro. Olinemen are tricky because outside the McCoys and such, it's hard to gauge who will be successful. We have better success with second and third round picks but that involved Payton. Is Ireland still around?

Oline is a gamble. We saw it weaken in 2013 and it really did not pick back up until 2018. It took a while to fix the guard spots.