The average occurrence of that sort of mentality across the population suggests most PhDs would have at least that majority view as being a subset of the larger. There’s also no reason to assume the factors that lead someone to obtain a PhD counter an elitist attitude. If anything, it certainly bolsters the odds through sunk cost and other psychological factors.

Put another way, it’s been my experience that nearly everybody has a view that they’re better than average or different in some positive, unique way. The worlds full of hostie personalities as well.