Failing to understand that different people have different preferences isn't a terribly interesting stance to take in public. These sort of sentiments are better worded as a search for knowledge, instead of this sneer.
You are the one sneering. "Failing to understand" is a completely respectful stance. It places the lack of understanding on the person saying it. It leaves open the possibility that the person saying it is wrong. It's skeptical but not without a degree of humility.
This is opposed to a straight up judgement, like what you have just done.
