The NFL is a razors edge. These teams practice and film so much that the smallest advantage becomes gigantic and the smallest flaw utterly and brutally exploited. A lot of what is going on is the system. Two years ago it was Matt Ryan and the Falcons. Last year it was Wentz and the Eagles. Yet the Eagles won the SB with a backup QB. I'm not going to say Mahomes is fake, but he did allow 3 defensive TD's, all terrible decisions.
A great QB finds a way to win even if they face adversity. In this case the adversity is not having a full complement of weapons. The true measure of a Mahomes, Goff, or Wentz is how well they do when some of the contracts of those great skill players expire and are replaced by more pedestrian talent. We know who the great QB's are because they continue to adjust and thrive even when the team around them is struggling in offensive talent. So lets wait a couple years and see what Mahomes does when KC has to unload a bunch of talent because Mahomes is asking for 25M, along with Hunt and a bunch of other players who participated in the success.
Ditto with the Rams. No way you can retain that assembly of talent for very long. Than we will see how good Goff really is.
