I'd add these to the list:
- clergy. Whether or not they're seducing underage parishioners, they're selling snake oil--trying to convince people to place faith in a God who allows billions of people, including newborn babies to die of agonizing diseases such as cancer.
- chiropractors. Studies not funded by the chiropractic industry show generally low efficacy yet chiropractors market themselves relentlessly, often beyond what they can responsibly claim to cure. The only area that NIH studies find chiropractors helpful for is lower back pain and even there, no more efficacy than treatment by a physician.
- journalists. I have the most disdain for that profession because it has so much power to change society and uses that power so irresponsibly. Although most journalists have experience at nothing other than writing, they have the hubris to believe they know what's best for the world and are so sure of it that they abandon their nearly sacred obligation to present issues in full dimension, fairly, and instead, manipulate readers into believing what they believe and censor or destroy those who dare disagree. Instead of being wise stewards of the marketplace of ideas, they are the Barbarians at its gate.
- Librarians. I find them trustworthy and helpful. (Of course, they have little incentive to be untrustworthy.)
- Nurse practitioners and salaried physicians (e.g., those employed by Kaiser). Too many physicians who are paid per patient and per procedure are tempted by financial reward to prescribe treatments that yield them more money, even when not necessarily in the patient's best interests. And because physicians' training is so long, hard, and expensive, they feel entitled.
- Philosophers. I think the world would be better run if led by an ideologically diverse tribunal of philosophers.