I took a class while I was at Iowa State with the Economics Professor who's dissertation was on college pricing. One of the exercises he had us do was to calculate the net present value of a college education. We found, and it is in line iwth his much more advanced paper on the topic, that even at today's usurious tuition prices, it is still financially an excellent decision to go to college and is one of the best investments one can make from a monetary perspective. This is of course, on average. Not all degrees and jobs pay as good as others. But especially back then your highschool teacher was speaking something stupid by not encouraging the kids he's teaching to make the best decision of their livesI'll never forget having a teacher in high school in the early 2000s tell us that for a large percentage of people college isn't cost effective. Seemed crazy then, but I'll be damned if he wasn't on to something. Way too many people with 100k in debt working a 40k/year job that would have been much better off never getting a degree.
My wife doesn't have a college degree but has attained a very good job. I have an advanced degree and while I earn more than her, I imagine if you penciled it out she will net quite a bit more than me over her lifetime.