Sorry, still dont agree Szczepan.
The head teacher chose him over everyone else; the relation between shihan and 6th dan is the same as the one mentioned by the original post, that is to say, the one(s) between teacher and student(s). Perhaps you and I might not LIKE it, but who are we QUESTION or DOUBT it? Remember, we too are the students of the teacher, so to say the teacher is incorrect is to say we know better than the teacher (again, we might think that, but I for one would never voice that opinion aloud).
Personally, I would rather attend class given by anyone, even un-ranked and THEN drink my beer than to simply go drink beer with no class at all....if there was no other choice in the matter.
>note< Hard liquor is equally acceptable