I think PFF ratings are to be taken with a box of Morton's (when it rains, it pours)
Consider:
Bills currently have the #4 offense on points (trailing Dallas by 9 points now), #2 for yards, #3 for Y/Play
Top-10 for pass Y/A, AY/A, NY/A
#8 for rush yards, #3 for rush Y/A
Does it pass the "logic test" that the Bills could achieve all that as an offense, even with Josh Allen being the Alien Creature we all know him to be, if our OL were actually 28th in the league?
I'll go with Greg Cosell, who uses the old-fashioned eyeball: our OL is average or a bit better than average, no more. Josh Allen makes up for a lot of flaws. But he doesn't allow for the Bills to have a top-10, even top-5 offense with a bottom-of-the-league line.
That, My Martian Friend, would be an "Earth Shattering Ka-Boom"