To me, a guy like Mahomes fits into the Mobile QB category. I do think that running QBs tend to either evolve into Mobile QBs, or they end up having limited success and longevity.
Mahomes to me is best QB I have ever seen, even if he were to never play another down. That said, the mobile/running qualification is really subjective because it doesnt consider the talent surrounding him.
Mahomes came in to the league and was throwing to future HOF Tyreek Hill and Travis Kelce both reaching their peak, had all pros on the oline and a terrific RB in Hunt. Heck, his backup WR's, Watkins, DEmarcus & Hardman are equal or better than anything Lamar has had.
Cant win without weapons, and I dont think Lamar has had anything close to championship caliber.
So he utilizes the best weapon they have, himself