By applying going through the phases of those jobs. The tests they take to move up is based on job experience.
The 25 year old came in with all that knowledge cause his peoples did that work and took him to work with him as a kid and on the weekends for side jobs So he actually knew all that he needed to pass the test for something like a masterclass 3 tech years before he took the test because of all the work in the field he had been done.
I keep telling you all good paying jobs don't require a college degree.
You think it's fair to compare a kid that had parents capable of showing him the ins and outs of their business with everyone else? What should kids with parents who didn't work in their preferred field do?