To start, I never said Chuck had BAD kicks, but that he doesn't utilize them outside of the odd leg kick here and there.
Also...Chuck has excellent take down defense and the brute strength to stand himself back up. That doesn't mean he has a good ground game. It means he can sprawl well and that he has strong legs (technique=good at ground game, brute strength=do what you can to get out of ground game)
That aside...

There have been I think 4 deaths in MMA, but ZERO deaths or SERIOUS injuries in a sanctioned match (plenty of breaks and tears, but nothing serious). There's actually a video of a guy being killed in an MMA match on youtube somewhere. Basically, the ref/doctors are a LOT quicker to call a fight in MMA than in boxing. It breaks my heart to watch boxing matches where one guy is getting pummeled constantly, and maybe even knocked down a few times, but he has too much heart to quit, but all he can do is stand there and get pummeled. You really don't see things like that very often in MMA. It happens, but usually, as soon as you go into "just don't get killed mode" (e.g. Fetal position on the ground, or just leaning against the fence with your hands over your face) they usually call an end to the fight for "failure to intellegently defend yourself."

Plus, as Dana White is so fond of pointing out EVERY time he has the chance, in boxing, you can get rocked, then take an 8 count, then get back in the fight, only to take even more severe damage to an already hurting brain. In MMA, once you get rocked bad enough to need an 8 count, you've already been hit once or twice more and the fight has been called, or you find yourself deep in a submission hold.

But basically, what it all boils down to is that MMA organizations KNOW how deadly dangerous the sport can be, and take EVERY precaution they can to protect the fighters and prevent something serious from happening.