I think high school kids in the U.S. should be exposed to STEM, the humanities, and the trades. We have pushed college/academic achievement long enough, and I suspect that some of the data we are seeing represents a backlash against it, particularly when you consider the cost of university and the job prospects for new graduates.
Only if you can start your independent business, which few can do pretty much by definition. That's still a recipe for bimodal outcomes. And the U.S. has pushed "college achievement" on paper, but their K-12 education still sucks. There's no way that this isn't a drag on college outcomes.
To be clear, I'm not suggesting that the trades are a gravy train for everyone, but the idea that you will barely make ends meet is also not the case.
But union jobs are at an all time low.
In my area nearly every high school including the one I attended offered great programs that for many lead to careers in the trades.
I know several people who were in one of the trades programs who decided it wasn’t for them and seemed to wander aimlessly just like many of my friends who went to university.
Maybe the issue isn’t opportunity for training or trades vs university?
On a side note a skilled trade career can pay very well, but is it reasonable to expect everyone will be a union-member or own a business? Union support seems to be declining in the US and owning and running is business is not for most people.