i dont think we'll ever have a president in this day and age without a college degree.
Colossus, it's not about 'wisdom' - it's about that fundamental base of knowledge in all subject areas that you don't get working at a job (unless you work in about two dozen fields at once).
By the time you have a 2-year degree, you can write 5000 page papers with cites, understand a hell of a lot about advanced math calculation for most real life calculations, do most things on a PC, you understand histories of civilizations, you've been explosed to art, history, music, and culture of the last 2000 years, you've spoken in front of hundreds of people, you've worked with teams, you've had 2 years of another language, you've dealt with professional standards, and you've become fairly proficient in about a dozen other things.
Working at ANY job won't give you that diverse set of skills and experience.