Humans (not any specific type of worker) are bad about risk versus convenience trade offs. They really like dangerous shortcuts as an example. Like, people who are on the clock, and they see there's a safe route to the work site, but if you cut down this steep embankment it's slightly quicker, although you might fall to your death... Humans will take that shortcut. Even though they're on the clock! They are risking death to save somebody else money, where is the sense in that? But that's not why they're doing it, they're doing it because it seems convenient. So we have to arrange things to make unsafe practices also inconvenient and then humans stop doing them. Put a fence along that steep drop, now you'd have to climb a fence and it's no longer a shortcut, so they use the safe route.

It is not only that, awareness plays crucial role in safety, there are numerous factors that negatively effects awareness, some factors might not be related to job at all, it might be "simple" commutative cognitive fatigue. Arguably, this issue is irrespective of training quality and/or understanding of job risks (smart), to large degree.

>Yes some individuals care less than they should.

Is it really an amount of "care", or that some people just have an ability to not get bogged down by the scary stuff. There would be no X-Games at all if we were all wired the same. There are people that voluntarilly get off of their motorcycle at the apex of their jump to score some extra points. That's beyond insane to me, but to them it's part of the job.