The biggest underlying thing, I think: In many cultures, there are
many deferential status cues but very few explicit cues for high
status; rather, high status is inferred when you do not emit
deferential cues. People whose brains naturally pick up status cues
are likely to perceive someone who omits them as "arrogant" or "pompous",
but it's extremely hard to emit the right deferential cues in the right
ways so as not to come across as condescending.
I can usually do it, but then, I spent >5 years doing technical support,
and developed a lot of specialized skills from it.