It's clear to me that everyone wants to feel that what they are doing is special and close to unique.

This is not necessarily bad, but it's something that you need to be aware because it can be a misleading feeling.

The main causes I observe for underestimating other professions are: 1) Your EGO 2) Some jobs really have a lower barrier to entry which attracts non-skilled people 3) The unknown of what other's actually do

Think of this, because it's very dangerous to believe that what you do is so special.