it isn't stereotyping if it is true - it is the positioning of the profession. Whether any individual one of those people is or is not doesn't change how they have set the game up. Also - when you talk to them as professionals and not as clients - they are. When you read their notes - they are. When you have them in a position of weakness - they are. I do agree they are often very good actors.
The arrogance is systemic - that they know what is in someone else's best interest for example, is to me, the height of arrogance. If it is not to you -then have at it. My opinion of those people need have no bearing on yours.