Go read /r/LawyerTalk and enjoy the horror of the dawning realization that this is a lot of professionals. I think it's an issue that stems from getting too deep into the minutiae of the technical and cultural matters of one's field; you become a really good scientist, or lawyer, or SWE (by the standards of scientists and lawyers and SWEs), and end up coming to conclusions that everyone outside the bubble looks at and says, "That's absolutely asinine." Well, laymen just don't understand the details, you know? (Even though the whole point of these professions is to provide services to laymen, fix problems laymen come to them with, and guide laymen to make practical and logical decisions when a $500/hr appointment isn't called for.)

These people take themselves too seriously, and other people only take them seriously when there are material ramifications for not doing so. Otherwise, they're viewed as pompous busy-bodies and don't do themselves any favors by playing to the role.