I can’t think of many jobs harder emotionally than what those mental health counselors have to deal with each day at the office.
Here’s one: 4 shrinks open up an office and start seeing patients. 6 months later 3 of them are visibly affected. Depressed, put on weight. All that from their work. So the 4th one looks just fine after those 6 months and the others ask what his secret is. Answer: “Simple. I don’t listen”.