It helps to have a future HOF QB, but it isn’t absolutely necessary. Eagles almost won that game with Hurts, and while he’s good, he isn’t a Brady, Mahomes, Peyton,
Montana,etc.
What it does seem to take is:
* QB - elite/high end who is extremely poised, calm under pressure, limit mistakes and turnovers.
* High level coaching - schemes, disciplined teams, game management.
* Great OL
* Elite TE or WR corp… KC is similar to the Patriots w/ Brady…Great TE with productive, under the radar WRs.
Eagles have elite WRs with productive TE.
* RB - none of these teams had elite backs. Mostly 2nd tier guys who are still productive due to great OL and system.