Why are people like this?

Yes. My father. USMC. Deployed several times in my life to locations not so stable. I know what worry looks like.

Never recognized it in him.

Yes. I've felt worry for a few people, and had others feel it for me.

Eventually you realize the worry doesn't help or change anything. Maybe it's faith or fatalisim, but accepting that life will do what it does in it's own time lifts a lot of burdens.

My brother. A police officer for around twenty years. He wasn’t exactly nonchalant about the things he saw and experienced, but especially with our mother, he didn’t discuss the job.

Even now that he’s retired, he’ll occasionally mention something (like the fact that he never had to shoot or kill anyone, which he says is not uncommon, few do). Like most in that profession he’s seen the ugliest sides of human behavior, yet he remains a kind person.

I worked as a police officer for years. My mother was always a nervous wreck. My younger brother worked in a steel mill. My police department didn't lose a man to assault or gunfire in 25 years. My brother's steel mill had 2-4 people killed every year. She never worried about him

My husband. He builds pole barns and houses and he is pretty high in the air! He's been hurt a lot because of work. It's no joke working around heavy equipment.

They are usually experts in the field, trained to handle the risks. So what looks dangerous to you, and would be dangerous for you, is mostly routine for them . Routine that requires care and vigilance but routine nonetheless.

For a non-military example take a look at Fred Dibnah scaffolding a tall chimney and taking it down brick by brick.

Everyone's different. Some are worriers and others aren't. Some people find something else more important so it seems worth it to them

Yes. I end up having to distance myself from them, at least emotionally.

You really can't worry about it 24/7 but do have to.be careful to prevent trouble/injury.

Because subjective attachments shouldn't define how we come to value human lives.

Because they believe in the necessity of what they do more than anything else life has to offer.

Because there are worse things than death.

Because they were conditioned to reckless sacrifice for the collective.

Because they have certainties that outweigh any fears.. etc

Military brat here. So yeah I get that feeling.

I refuse to be beholden by my fears anymore

When you are in those situations is often best not to think that way, it can become self fulfilling

Well, maybe stop projecting where a person needs to be, it's not your job. If they need to walk themselves into oblivion, maybe they need that?

Because they’re not focused on the dangerous aspect of it otherwise they couldn’t do their job properly or because it would diminish the rush/joy of having such a lifestyle.

That person believes they are expendable.

Empathizing with the wife of a Suicide bomber? 😀

Need specifics