Make sure there’s demand in your field before committing

I think it's just showing that trades offer a steady income from start to finish and they're usually pretty in demand rather than studying for years, accumulating tons of debt, probably struggling to find a job and only being able to make a life for yourself a little bit later on once you've accumulated the same amount of wealth
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My dad is a plumber and he's done the research (because I wanted to go into a trade but he wants me to study further) and over and equal life span both of these people accumulate about the same amount of money over the long run it's just that tradesmen make it in less amounts over a longer period where as people who have tertiary education and the jobs that come with it start with really little pay and then work their way up pretty steadily because they have to pay off debt etc
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This of course is seriously generalized and doesn't apply to everyone

You both make valid points. I think the primary intent is to illustrate that people look down on trade or “roughneck” work often- despite it being potentially very lucrative. However the way this is presented puts forth the impression that it is highly skewed towards trade work. While often times a person working a trade through their teens and later life pencils out to make similar to a person who went to a college and delayed work by 4-10 or so years. However, not everyone can be a trades person by abilit or by the simple facts that we need other kinds of workers too, and flooding the job market devalues that function. So many jobs aren’t “learn on the job” and require schooling before you can even start doing the job in order to be able to do so safely or responsibly. Some people don’t want to waste away in an office dealing with politics for their life. Some people don’t want to be crawling around and doing heavy lifting when they are old and want to know they’ll have a nice desk.

Yup yup