Josh's backyard football is plenty enough to get us to the 20. Even in the playoffs. Inside the 20, some combination of better RBs, better play calling, more time for the QB, and receivers more receivers getting open is needed.
Imagine the Eagles without the Rugby scrum last year, or the Chiefs without Reid scheming Kelce open every time the Chiefs get to the opponents 15 yard line.
The Bills in the McDermott era have had no red zone persona, except when they were comfortable letting Josh run QB sweeps a few years back". Otherwise, nothing to distinguish them. Hence ranking 14th in RZ offense last year, despite having one of the best QBs in the NFL both passing and rushing.