Talent supercedes everthing. Only average Joe's like to push the hard work angle. You have two guys who train the same and one is naturally far more athletic, then who do you think is going to progress the most? Lesnar has the striking of guys that have been training a few weeks, Ditto Carwin, I could bet you a million pounds that Toney would never do jack as a wrestler, just like Anderson. All of these guys are very hard workers save Toney, but he is so fat and punch drunk i really don't see him picking anything up.
Silva even now has shitty wrestling, what he does however have is good BJJ and he is in no way similar to James, Silva actually has legs, he can move and decent Muay Thai to keep guys hesitant. James has never had any footwork at all. Mercer is nowhere near as accomplished as James and even more shot as a fighter, but had one equaliser, power. James had nothing to offer.
The writing was on the wall, The fact that he even got a fight given the circumstances puts the org back at least ten years.