I concur I would love to see him play for the Raiders in that division playing Mahomes & Justin Herbert twice, but he won't and quite frankly, shouldn't.
What if he played for the veteran minimum?
It would be ultimate bet-on-yourself move, to increase the value of his ownership stake with the Raiders (via a Lombardi win).
At this point it would make me laugh. The AFC West would be like the NFC West was in 2021 (full of teams that would win most of the other conferences).
Imagine a scenario where the chiefs finish third (or last) in their division with a healthy Mahomes. It permanently shuts down any talk of Mahomes ever surpassing Brady.