well in a way he has a point. QBs are drafted to win superbowls but the question is which QBs would you have picked to build a team to win a superbowl. Dilfer was done. Ravens signed him out of desperation. in that season, he was injured and they had Tony Banks start. they went three games not scoring more than 10 points and won those games... its how you build a team to win a superbowl, that's the key.
and right now, KC has lucked into Mahomes and he is 50% of what they need to win a superbowl. take him out and KC is an average team.
and last I checked there is only one Mahomes. nobody else in the league comes close. even Burrows is no longer a Elite QB, because his team is 4-8 and no recent success (the measure of eliteness according to many on this board).
the only other QB who teases is Allen and he is an enigma at times.
the other 30 are there and need strong support around them to succeed. everyone was licking Purdy's boots, until he lost some of his weapons and he looks below average. all the rest are very similar.