I think Canada could do waaaaaay better at training people in trades. One of the reasons I understand that many trade schools require HS or better to get in, is that the demand to get in is very high and they need to screen applicants somehow.
Also, there are significant written exams at the end of the apprenticeship process etc (I had a buddy just get his electrician's papers) and without HS math and English skills I think the odds of passing those written exams is really low.
My father went to a technical HS (Danforth tech) and studied printing which served him well throughout his life. But these days to operate a printing press you need to be able to run some pretty sophisticated equipment.
Middle and High School education in general doesn't work very well in North America. One could argue it is designed for the median intellect, but in reality that is merely its target but due to disruption and disfunction, its rigged for the bottom quartile. Any exception to that general principle can best be classified as "designed to educate girls" and boys just don't flourish in this co-ed + mediocre enterprise.
The establishment is terrified to teach children "how to think" because they'll question the lunacy and incompetence of the system, likely departing the system rather than enduring through it.
My brother went to a boarding school that did a pretty good job of teaching kids how to think, but also undermined themselves because the kids did learn the essentials and in turn rejected the system after gleaning the knowledge. One of his roommates got expelled and went on to become the most influential action film director of the modern era, the other became the top real estate broker in Hawaii, and the last is a CEO of a software company.
My school on the other hand was fundamentalist and they absolutely focused on brainwashing rather than educating. Roughly 72 kids in the high school. The pretty girls earned their way the old fashioned way, they married well and then divorced with half. Most of the guys flunked out or close to it, they still live in the small town. Others got raided by the DEA within a few months of graduation (the two most religious families kids of course). A few others attempted to run away from the trap of small thinking and were murdered by highwaymen hitch hiking. I proudly flunked out with a 0.33gpa cumulative, built a few consulting businesses to the Fortune 500, and thankfully found the "true educators" in society. My first degree was my MBA and the faculty actually knew how to train people to flourish, revered skeptical inquiry, and taught systemic thinking rather than warped indoctrination.
I think the blue collar trades have it worse than the "John Galt" stereotypes above, the teachers put those guys in the "loser" group and give them useless, remedial classes when every tradesman needs geometry, physics, and trig to truly flourish at the highest levels of machining, carpentry, HVAC, and the other noble trades. The best of our blue collar workers have to learn the fundamentals of their craft on their own because it wasn't encouraged in the school systems for the "dummies". (all contempt expressed being the genuine feelings of the education system that have built nothing)
It has been my experience that the North American primary education system is something endured and rebelled against to flourish. I've seen these facts in virtually every top 1/10th of 1% wealth holder, every small business owner, and every ground breaking academic. They are not doing what they were told, they are defying it. Those that can't do, teach, is a valid stereotype in many quarters.
In short, most people test the theories of the US primary education system, learn to do the opposite in most instances, and turn out in the top 10% or better.