Not all players or all teams are built mentally the same way.
We regularly see meltdowns that a player or team just can't get past.
Or we see players lose it (DK Metcalf is becoming famous for it). And it doesn't help the team.
Then we see guys like Brady and Wilson that simply find another level no matter how far the chips are down. I think we can add Stafford and the Rams as a whole to that list... and you have to give Snead the credit for insisting on these kinds of players and McVay for never allowing his guys to feel they're out of it.
Adversity is life. And sports can teach you that adversity is the most normal thing in the world. You just have to keep churning.