Honestly, and this isn't a shot at the guy at all (he's one of my all time favorites after all), Lyoto is really giving the PC answer here... even if it is the way he feels.
Basically saying as long as it's within the current rules, "what's the problem?". Which is a valid point. I generally stay away from TRT discussions, but I'll say here, just this once... there is no room for gray area with something like this. They need to either ban it completely, or continue to allow limited use and the topic needs to be dropped. End of story.