The Issue on Leech

Yes it's tunnel vision. By what you wrote, the "bad" people either quit or continue. If they quit, they're part of the "most of the bad" that you described. Seeing people as good/bad is tunnel vision no matter how you look at it.

Let's say a murderer feels remorse for his crimes, and spends years helping others to ease his guilt? Would he still be as "bad" as a murderer who enjoys killing?

You do know that happens in real life right? The people who suck up more generally tend to advance faster than even the most diligent workers.

1. When I mean good/bad I did not mean the classic good/bad of heroes vs villains. I am talking about people who deserved getting to where they were, and people who don't. Good players can suck it up through training and know what to do. Bad players can't because they don't have the dedication, and sometimes because they can not play their class.

2. When the hell did my example showed sucking up? This is a shmuck who is doing all the work for person A and person A takes all the credit. It did not pineappling matter if the shmuck spent 9 years getting that big promotion, or 3 years sucking up to people to get that big promotion. The point is in the end the guy who put absolutely no effort towards his job is getting all the benefits and credit for what shmuck did.