Your experience is limited John and then is colouring your view. I see it from the inside. It does happen - and a lot more than it should - but as I said it is less frequent than you believe
Both interesting articles, but they're both over 20 years old, and both highlight failings by the police agencies to offer effective psychological counselling for police involved in a very stressful working environment, rather than offer any insight into LEO culture. I appreciate that you (and some people you know) have had fairly horrendous experiences in the past, but I'm not sure you can use these articles to make any claim about the personalities of LEOs, other than that they received incredibly little psychological support back in the 90s.