Why is it so hard to find good carpenters?

Ran into this article on the Web. Very interesting point.

All carpenters are not capable of being contractors! Don't hire a carpenter and expect them to handle all the sub-trades coordination. If they don't have EXTENSIVE self-employment or project management experience, they simply don't know how to plan and manage your project! (cost-effectively) How did we get here? There are many reasons and no simple explanation is possible. However, there are some striking observations that all conspired to bring us to the mess we now have. First, for nearly 50 years our education system convinced everyone who was capable of spelling their name correctly, that they needed to get a university degree. Trades workers were seen as some how less important than educated workers. We now have the ridiculous irony of people with Master's degrees working in warehouses and 100,000 skilled trades positions... vacant! Intelligent people that could have been earning great incomes are working in dead end positions because their skills are not in high demand. Starting over, to get trades skills training would involve financial hardship.