Again, that doesn't appear to be the case for all. That counts for SEC and blue bloods, but not so much any other team.
Bo Nix had the stats, but his team lost twice. Both losses dropped his stock to where he got very little vote.
Penix had worse stats in many/most categories than Nix, but carried a fairly close second place on the back of an undefeated season.
Most years we see guys with a solid season said to be out of it the moment their teams lose.
So the only people who make your blanket statement are those trying to defend why their preferred finalist deserves it despite their team, while other years they will tell us player x is out because his team lost.
There are different standards for different players even within a given year. That's how these work.