It only takes once.
Aside from my Army service and Airborne, I have spent much of my life in far more dangerous jobs than fireman.
Roofing is almost twice as deadly, and construction, taxi driver, recyler/trash, farming and ranching, fisherman are all more dangerous, many jobs are.
It isn’t like firemen die all the time, obviously men don’t worry about such things, or we wouldn’t be building the world and driving taxis, and delivery trucks, and being fishermen and farmers and ranchers.
You're an asshole! My father was a captain in Jersey City. He watched two of his men die. He still walked into engulfed buildings pulling people out.
I somewhat followed in his footsteps becoming a volunteer in South NJ. I attended four funerals of brothers caught in a woods fire. I had people die in my arms. I walked into fully involved structures, also pulling people out. Like my father, I was was scared most of the time.
We did what we had to do, because some one had to.
It only takes once.