Do you watch football outside of the Dallas Cowboys?
There are plenty of QBs that can go toe to toe with Mahomes.
Josh Allen literally outplayed him in a playoff game
In the 2021 season, Herbert out-played him in Arrowhead with a game winning TD with 32 seconds left putting them up 30:24 and won the game. The second game, Herbert put them up 28:21 with 2:19 to play only for Staley's non-tackling defense to choke as usual. Herbert out-played him last game, but the refs apparently pulled a Brady calling back some INTs for Mahomes if I remember correctly. Herbert got them the lead at 27-23 on a TD pass with 1:46 to go. They are 3-2 after that game, Mahomes holding the edge.
By 2021, in a total of Mahomes 57 career starts, Mahomes at that point was only outplayed 5 times by a QB, as far as Comp Pct, Passing yards and Yds per attempt and 2 of them are owned by Herbert. Not sure how much as changed the last couple games though.
People are insane if they don't think you can put Herbert in Reid's offense and that offense wouldn't lose a step. Hebert been doing it with a battered offense and Lombardi calling plays.