I would say this would also put a damper on whatever numbers he wants to put up. Mahomes felt the sting much earlier, especially considering Brady dealt him two of his losses - as you pointed out - while putting the ring on his own hand both times along the way.LOL. Brady didn't lost a playoff game until his 6th season in the league and had 3 rings.
Again, as he said, we can look at it in ten years but I don't think it's going to happen. Don't get me wrong, Mahomes is a great player, but he's got a ways to go.