Dak has operated in a run first, dumbed down offense under Garrett with marginal, slow, pass catchers. The offense rarely went deep or was aggressive.
When we had to use the hurry up, spread offense late in games Dak bloomed. Its why he has so many late game comeback wins. We also saw what happened when he got a high caliber WR to throw to in Cooper.
You put Dak in a high powered offense like KC with all those weapons and he would take off. Cant say he would put up Mahones numbers, but he would put up much better numbers. If you understand schemes, offense, and coaching, then its easy for you to see this point.
IF Dak didn't have the skills, then these late game heroics he has led the NFL in would never happen.