Exactly, and I can't help but feel like the Chiefs saw something that makes them think Hill is about to drop off a cliff, production-wise.
there was reporting that the Chiefs made Hill an extension offer that would have made him one of the highest paid receivers in the game and he rejected it because he wanted to be "the" highest paid receiver. The Chiefs didn't have cap space to afford the deal he got from Miami without cutting other pieces. Hill also told the team he'd hold out in 2022 unless he got an extension.
So the Chiefs decided it was better to trade him and get something. It seems like a smart move given the return.