lklawson
Grandmaster
To be honest, I wouldn't have viewed it as "worse" per se, but, instead, equivalent. Both are presumptions. "Nim" would have been presumptuous of an honorific that I have not agreed to. "Sabum" was presumptuous of an instructor-student relationship. It was, frankly, a tad insulting. Interestingly (to me anyhow) there are some historic contexts where such a presumption would have been the beginning of a Duel.It could have been worse.
"Hello, I am Kirk."
"I am you teacher."
"Take our your sword and let's see if you have anything to 'teach' me."
Peace favor your sword,
Kirk