This is just a danger in the medical profession, but especially for first responder or trauma focused parts.

My BIL is a pretty highly credentialed RN. He was seriously considering quitting a few years ago and was asking me about software dev or IT as a career path. I didn't ask for any stories as that would be disrespectful & insensitive, but he was working in the NICU (intensive care unit for infants) and had transferred in from the ICU.

Medicine is clearly his calling, but even as an outsider I can understand how emotionally draining it would be to have to struggle (and sometimes lose) to save children's lives and then go home to your young family. It's tough to see death and suffering daily, and this is a big struggle for these parts of the medical field.

My BIL ended up transferring to a specialist organ transplant unit. He continues to apply his trauma experience, but doesn't need to see quite as much trauma and death on a daily basis.

Suicide & self-harm/addiction issues are higher, and it's not uncommon at all for people to need to leave the field after a traumatic event. If you aren't in the field or don't know anyone who is, it's easy to gloss over how soul-wrenchingly difficult it is to deal with having to be calm and professional to help people going through trauma. Some of the stuff these folks need to deal with is truly horrific, and it's no wonder that PTSD is fairly common.

Also not surprising that EMS has a bit of a fratty/military culture. The job demands high periods of physical exertion and exposure to stressful and traumatic experiences. I'm glad there are people who do this work, but I very much understand why it is difficult.