High kicks...they are an unusual weapon. Like firearms, I don't personally believe that one must specifically be able to use high kicks in a combat situation to be a martial artist. However, if they are used, they should only be used if one has been trained to be effective in combat with them.
Just my thoughts though.
I do agree, it is a good point of view.
I will however, add this sentiment:
You DO what you TRAIN.
If you are a student of martial sport, where high kicks are the norm, then when confronted, you will react as your body naturally knows how...depending on the environment, this could be a bad thing.