The Cowboys offense since Dak became starter has had more talent on it then the Chiefs offense. The difference is the Chiefs have an all time talent at QB while the Cowboys have just a good QB.
Mahomes was so impressive that he took Alex Smiths job without Alex Smith even playing bad. Dak would have never seen the field if not an injury to Romo and Moore. Mahomes has always had it.
Outside of Kelce and Hill who on the Chiefs offense would you consider top level players?
The Cowboys have had Zeke, Dez, Cooper, Gallup, Martin, Smith, and Fredrick. I might even be missing a couple guys.
So, to answer your question, if we had Mahomes instead of Dak the past 5 years we'd have a ring or 2 easily by now and we'd be looked at the same way the Chiefs are looked at now. UNLESS Jerry found a way to screw it up, which is always a possibility.
Mahomes worst season was also better than Daks best season.
Mahomes is an all pro. no one is denying that. but at least you are comparing Dak to the right group of QBs...its an improvement on your part.
with that Said, Kelce is an all pro, so is Tyreek Hill which puts them at a different level than just a good WR. they are difference makers. its not just having those players....in comparison Dak had Cooper, Witten and Gallup....
They also had all pro OL men on the team (1st team and 2nd team) over the past 3 years as well as on defense (1st team and 2nd team) over the past three years...
they have also had several OL men in the probowl in the past few years.
so there is some talent around Mahomes...the cupboard is not empty.
and you are right, Dak may not have played in 2016 if not for injuries and I wonder if that's talent evaluation process being faulty. are there other players on the team, not being recognized for their talent....I have always faulted our defensive talent evaluation process that had netted one good player in 15 years from 2005 through 2020....namely Lawrence..
so would Mahomes win a superbowl and go to another one if he was in Dallas vs. KC. I am not sure (much like you) given we had Garrett and then MC and a really bad defense (which even mahomes couldn't over come based on history). would he have done better? of course. no denying that....its Mahomes after all. but superbowls, I think it would be safe to say fat chance. Dallas is where you go to bury a career....