In my line of work I see this all to often, for those that don't know I'm a Union Official for the Electrical Trades Union working in the Construction Industry.
I don't have an issue with what anyone has said, I just look at it from a different angle, and give the kid the benefit of the doubt until all the facts are known, for all I know he may be a moron, and for all you know he may not.
Most of the time when someone is considered useless, stupid or having no clue about what they are doing, it's because no one has invested the time to train young people and apprentices properly, the key word here being properly. Some kids need someone to take them under their wing and put the effort in to make sure that they understand what they are supposed to do and why.
The major part of the problem, and I'm mainly talking Construction Industry here, but it would apply to most industries these days, is that program's and deadlines are so tight and Contractors have gone in so cheap on price to get the job that they do not have the time to train apprentices properly, because they will lose money.
Some kids are mechanically minded and pick things up pretty quickly and are confident with what they have to do pretty much from the get go.
Others aren't so lucky, they lack confidence second guess themselves and rather than ask a stupid question, they make a stupid mistake, and then they are cast aside as useless or stupid, and left to do menial tasks because no one has the time to train them because the job has to be done.
These are the ones that need someone to put in some extra effort so they become a tradesman or qualified but unfortunately no one has the time for it anymore.
I also blame the destruction of the Technical School system, I won't go into that or this post will go forever.
In saying all that, some kids/people just aren't suited to the job they have chosen no matter how much effort someone puts in.
We are all different, no matter how much you think you know, you don't know everything.
All I'm saying is sometimes people need to be given the benefit of the doubt, as there's usually a reason why people are like they are.