The "best QB in the league" is injury prone and has two weapons on offense. One of which is an aging tight end on the wrong side of 30. The team is top heavy with most of the money going to a few guys (and Hill) and given Mahomes massive contract there is little room to add sorely needed depth. The history of the NFL is littered with flash in the pan teams who win one and never repeat. The Seahawks being the most recent example. If Jimmy G does not wet himself in quarter four of last year's SuperBowl Mahomes still has zero titles. So to act like this team is a lock, or even likely to win another SuperBowl in whatever short window they have left with their flawed roster construction is just silly. Especially with Brady, Favre and even a vastly improved Rams team still lurking in the NFC. To say nothing of how a Watson trade (and free agency in general) might change the landscape in the AFC. I would not be at all surprised if KC never won another one. They were nearly knocked out of the playoffs by Baker Mayfield, for christ's sake. With his best WR watching from the sidelines.
Like I said, they are in better shape than us right now. But the bill for their short term success is coming soon and they likely turn into the Seahawks, at best, at that point. Meanwhile, we have the best coach in football, a guy that just won 7 games with probably the worst offense in football and several holes on defense. I trust that guy to rebuild a little more than I trust the Chiefs to be a decent team in five years.
If they win another title (or multiple) in the next few years, good for them. But it's completely reasonable to think that they wont. And if they don't. Pats likely beat them to the punch on the next one. Sorry if my opinion was unclear.