I got a problamo with it to. I think a lot of people do. You should not have 25 y/o guys squaring up against what could be 19 y/o kids in CFB on the other side of the ball IMO.
When I played semi pro arena ball as a 19 year old, I had to go against 30 year old juiced up DUDES who were previously from the league (practice squad guys, but still yuge and talented) and former collegiate depth guys.
I didn't complain. I put my head down, did the work, and was in line for defensive rookie of the year until I wrecked my shoulder playing against the reigning champs.
Moral of the story: players aren't complaining about this, only fans do. Players just play regardless.