It takes involvement at a young age to get people to understand what these careers offer. You’d be hard-pressed to find someone over the age of 25 who is willing to put aside his/her dreams of being a high-priced lawyer or Wall Street executive and pursue a career working in a Cargill plant.
Adults with those dreams probably aren’t the ones suited for it. Factory work is still a “working class”, rather than “middle class”, line of work. That really is at the heart of the issue as to why students aren’t raised to aspire to such positions—their parents have dreamed for them of a move up the social ladder.