You have the talent, so why not. If the past three years with Mahomes are any indication, at least offensively he won't pry defeat from the jaws of victory as the Chargers are wont to do. Plus bring in a defensive guy to take advantage of Bosa and the talent you have on that side of the ball and all you have to do is get by the Chiefs year after year.
Honestly, I think your bigger issue landing him is that it is in the division. I think he would go to a team outside of the division out of respect for Andy Ried. Other than Brian Flores from NE to MIA, I can't think of too many amicable intra-division head coach hires. It is more often acrimonious (see Mangini to the Jets) or a fired coordinator taking a HC job for another team in the division.