He literally just cited the stats for the very best pass rushers in NFL history at age 31 and beyond. Don't know what else to tell you.
"no player has averaged 15 sacks over the two seasons they turned 31 and 32"
So yeah, that's a zero, nada, zip.
Is there a chance he keeps a pace like the 7 exceptions he listed that kept an average as high as 13 sacks? Sure. But that's 7 guys out of every single player ever. Seems like long odds.
Also, you realize it's Brian Gutekunst you're talking about facing a decision to trade a 2nd round pick? More long odds.