If the very capable 49ers offense would have scored a TD in OT the pressure to do the same would be the issue for KC. So, was it 100% wrong to take the ball? No.
Mahomes is 28. This year he beat Baltimore and Buffalo in playoff games in their stadiums and won another SB and another MVP. What if he plays in to his 40s?
Players don't consider fans in their personal lives and that is as it should be. A quote from the original film The Magnificent Seven, "If God did not want them sheered, he would not have made them sheep." Fans don't matter they only think they do.
No need to compare at this date. Wait until his career is ended. Right now he is showing the ability to do everything asked of him and much more on his own.
I saw Steve Mc Michael in an airport many years ago and I thought "he's not so big". Later I saw him on the phone in one of those wall mounted phones with a shield on each side and he looked like a brown bear trying to fit in to a sardine can.