So from what I have seen from observing many Karate practitioners, and from my own training in Karate, it seems as if there is little or no emphasis on keeping the chin down. I understand the reasons for this in modern basic 3K Karate, where it is best to keep good posture in kihon and kata (so your chin stays up), and in point kumite there is no need to tuck the chin either. When Karate is trained in a combative way or for self protection purposes, despite all of the training based around dealing with strikes to the head, there appears to be little or no emphasis on tucking the chin. I understand that the aim of self protection is to avoid getting into a situation where you would need to have your chin tucked (via avoidance, pre-emptives, escaping, etc), but I believe that realistic training should still include preparation for a scenario where that stuff does not work and you end up facing strikes. Personally, I would always want to have my chin down if somebody was throwing strikes towards my head. So I was wondering, if you don't advocate keeping the chin down during bunkai, padwork, and/or sparring, what is your reasoning behind this?
I would be interested to hear anyone's thoughts on this.