So it DOES matter, after all. Screw up enough at job and your ability to eat goes away.

So, here's the point - as a baseline, if you have a fishing pole or can read a book about which plants are edible and which are not, you are not going to starve. Everything else is icing on the cake. Of course your actions matter, but there is a sea of minutiae that people tend to spend time on that simply doesn't matter in the grand scheme of the universe.

You will screw up. There are people smarter than you. Do your best to contribute and be honest about what you know and don't know, and you will be highly valued by your peers.