A general statement of "send your children to trade school" is an idiotic statement, considering we still need people to attend college/university in order to become doctors, nurses, social workers, engineers, teachers, biologists, chemists, physicists, speech-language pathologists, etc.
A better statement is, "If you attend college/university, make sure you pick a practical career." Basically, stay away from many of the humanities that indoctrinate the students with a specific ideology.