Newsflash. If they didn't care, they wouldn't bother appealing the fines. And it will lead to more 15 yard penalties so even if they don't care, their coaches will.
They appeal because they can. Also, the "They" I am referring to is the NFL. They don't care about concussions.
It's lipservice that you are buying into. They aren't doing anything to take it out of the game. After the fact, pennies on the dollar fines does nothing.
We see the hits in every game. If they were really doing something, they would work their way out of the game.