Are you saying that someone who trained in karate or judo, etc. don't know how to attack?
Don't tempt me!
Actually, I just meant that it is great to work against different types of threats. You have to be able to cope with the seemingly inane attacks, as well as good ones.
For example, up until last month, I considered a backhanded slap to the chest to be a worthless, perhaps even laughable, attack. I wouldn't have gone to much trouble to stop it.
Then I ran into someone who smacked the hell out of me, with a backhanded slap to the chest! It was a painful, hilarious, shocking experience.
So, working with these types of people is often enlightening as well as amusing. That is what I meant by "interesting".