You must keep one and lose one.
Which one do you keep, which one do you sacrifice to another team, say an AFC team... and get nothing in return. And why?
QBs are way more important than defensive players in the NFL.
There is a reason the SB winner every season has a stud at QB, like Mahommes, Brady, Manning, Brees, Rogers, Wilson, ect..
Who was the last SB winner that had a so-called system QB? Only team I can remember doing it was the Ravens with Trent Dilfer, but they had probably the best defense the league had seen in decades that year.