[Blarg]

You can practice groin strikes and other lethal strikes. As well as other strikes that are simply disallowed in different types of sportfighting. You don't have to kill someone with it for it to be practiced. It's called pulling your punches, light sparring, wearing goggles, wearing body pads, wearing gloves, medium sparring, etc.

Scotty's point about not having to have actually broken someone's arm in an armbar to be perfectly capable of applying an armbar and doing it applies here. You don't unlearn the ability to apply a technique just because you never killed anybody with it.