A sense of superiority due to status (including race, wealth, etc), and ability, is a stepping stone on the way to lessening the worth, and so humanity, of others.
The greatest ecologist and the patient in coma have the same worth as in “both have the same right to live, to be happy, etc.”.
That's a really interesting question. I guess I can't judge myself without bias, and I've most often been told I'm too hard on myself. So again the answer would be no.
Some of my best students were motivated by their competitiveness with someone else in the class.