Hahahah man, if you think they cant fight I dont know what to tell you. I've been doing karate my whole life and never had I got beat up, and I use to fight a lot. It only takes one kick to the head to knock someone out, just so you know.
+mrarch guy you need to calm down, if you don't like our discipline learn something different. This is competition karate, there are many other traditional more street applicable varieties if you care to delve any deeper, but please before replying make sure to educate yourself on our sport :)!