You don't get many good carpenters out of unemployed truck drivers. Good carpenters are born to be good carpenters.
That's the problem with most difficult to automate jobs that don't require college degree. They sound like anybody could do it. But there is huge difference between good renovation and bad renovation. The kind of guy who can do good job consistently is rare. The job requires passion and good attitude and personality that matches the job.
It's kinda sad how many men are passionate about driving a car. It's bit like how many women used to be passionate about weaving.