I never said it was unforgivable. Few things, if anything, is completely unforgivable. But no, "throws real good" is not on my list of stuff that lets you off the hook for awful behavior.
And technically, it is true that I don't know that he's a sociopath. Dick is subjective, and I stand by that one. I would argue that spending five years training animals to kill one another in an incredibly, and then watching them kill one another, and then not only deciding "I don't need to do anything about this" but also deciding "oh, I can make money off of this," and making that choice when you are already literally making millions of dollars a year, making that extra income totally superfluous, implying you also ENJOY watching these animals kill and maim one another (also heavily implied in that he ran the ring, not just participated)... yeah, that strikes me as cold, unfeeling, needlessly cruel. And definitely something you'd do if you were a dick.
But, maybe I'm just one of those absolutely crazy people that doesn't look at living things that are not harming me in any way at say "oh, I bet I could make those things kill one another by treating them in an awful, unnecessary fashion for some years, make money off of it that I don't even need, and probably have fun doing it."