Yep fear is pretty much what screws up all of us, some more than others.
I see this everywhere. People are so afraid of change or the unknown, so fear struck that they will stay in the same miserable situation because of it. Be it jobs, relationships, addictions, whatever it might be.
There was this guy who worked as a carpenter, well he was miserable as were most of his coworkers. So they all sat around and bitched and complained about their lot in life. "This sucks, this work sucks and we get treated like shit" (all true) But when opportunities came up in the company for better positions, like estimators, safety pros or other positions they all found reasons to stay right the f*ck where they were, in hell. They all said "not enough money, cant work in an office, not computer literate" any reason they could think of to not change....cause change is uncertain and scary.
Some guys had the balls to take a risk and have done very well with it. So guess what all the old coworkers start to do? Spew hate and more fear at the people who bettered themselves, but it serves them well as they just slip further and further into the abyss. Miserable bunch of little boys who are so far from brave. I have to say having the last laugh is very satisfying.