NTA There's this weird line of thinking that I see come up from time to time where some people think that as people rely on their jobs for their livelihood, you should just let them get away with doing a deliberately shitty job without complaint.

I don't think this is right. The person doing the job has a duty to their job properly and in this case with regard to safety. It si ridiculous to think that even when it comes to people's lives being at stake the deliberately incompetent worker's livelihood should be prioritized and protected over everything else.

Surely the people who should be most concerned about protecting their livelihoods should be the workers themselves -- and that's even assuming they don't have any pride in their work motivating them or even basic concern for how their actions affect those around them.