"I don't care what you do or how you do it. I just want it done by (dateline)"
This is what every Boss (and customers) would tell you. In other words, to put it mildly, they are saying, "I don't fucking care about your problems. Just solve my problems, you dipshit".
Everyone has a job to do (but whether you're being paid or not, is another question) and they have to complete it. Just like in an office you have projects and tasks and all have their deadlines. How you do them, is not important as long as its done properly and ethically.
But over here, it is different. For example, pulling a cable or cutting holes in the ceiling. There are no courses for you. There are no such thing as a University Degree for cutting holes in the ceiling, even. So, what you do is basically simple:
1) You learn by observing other people
2) You learn by seeing your Boss doing it once
3) You learn after being scolded by your Boss
Either way, you learn. And after some time, you become an expert at this job. All good and well, right? No. The problem is, although you have the skill, there are other things you need to be aware of. But since your Boss does not tell you about it, and you also are not aware about it, you won't even want to know.
And what is that? Safety.
To everyone, a job is a job and it must be done as fast as possible so that you do not suffer losses. And no one cares how they do it as long as the job is done, and the money paid for. And the more they do it, the more they are experts at their job, the faster they can get it done.
And everyone is happy.
Until someone falls/got electrocuted/chainsawed/killed on the job.