Disagree - they have been good enough to win, they just didn’t. It is very hard to win 3-4 playoff games in a row and sometimes it’s very little things that are the difference.
Even if you’re right, how are they going to win with 1 hotshot WR and a crumbling D? I just don’t think 1 WR is going to make that difference and the cost to trade for one will hamstring any hope to address other holes.
Further, if all it took was a great WR, then Miami would be SB champ and SF would have beaten KC last year.