Agreed. Law probably still has enough of his skills left to contribute, he just may lack the ability to put a reasonable price tag on his remaining ability, believing he has not lost as much ability as he has over the years.
Unlike Law, Lynch wants to play (like Troy Brown noted in his retirement announcement) and would accept the money offered but at his age doesn't have enough gas left in the tank. But who knows, if our safeties get dinged up he may reappear.
I suspect Lynch, if that ESPN article is accurate, would not be able to relate to Law's sitting out of the game when he otherwise could play and letting time slip away. Just different mentalities.