This is such a great answer.

Sometimes I do dangerous things at work. I once, light-heartedly, mentioned I am afraid of heights to the person who would be operating then gantry to lower us 20 m underground. I meant it as a friendly "hey I'm human too" to the worker who seemed awkward about having to take the engineer down into the hole. That very nearly ended the work.

I had to explain that yes, I am not a fan of heights, but that just meant I wouldn't be looking over the edge of the gantry going down. I learned that this type of thing is taken extremely seriously. It is critical that everyone can trust that the others on the crew can keep their cool if something goes wrong. The only thing that made what I said forgivable in terms of letting the work proceed is that I was down there to do a condition assessment, and was not part of the rescue team or operating any equipment. I was tied off and could be retrieved with the lifeline. No one would have to put themselves at risk if I fainted, for example.

In addition to this, I think the concept is cruel. If one supports the ability of those who want to die to do so, they should be able to do it with dignity and not risking a painful death or surviving with debilitating injury.

That’s what I thought. If they knew they were going into a life threatening situation, I guess it could be counterproductive as they might just seek to end themselves rather than do the task at hand (which might be to rescue people).