Attitude and work ethic I suspect.
I’m a retired industrial maintenance machinist. The problem as I see it is there are very little in the way of Industrial Arts education. most Technical schools were closed down because the education system wanted to force as many people as possible into Colleges and Universities. The other is employers do not want to pay high enough wages to give incentive to be a skilled laborer. There are other things too such as few young people work on cars or build their own stereos anymore so they have very little tool time growing up. Fortunately my grandson is very handy with both mechanics and electrical and is currently studying robotics.