I can't disagree with that, especially since that's the primary rea$on I went for an MBA instead of a masters in Econ or history (which was of greater personal interest to me). But there are some areas where it would be hard to be self-taught, just because, as you said, there is SO much information and data out there; it would be hard to know which road to take as you try to learn. And if you get on the wrong road, you just wind up being a well read idiot. But with help from my girlfriend's brother-in-law (a history teacher), I'm making at least a half-effort to learn about ancient Greco-Roman history. Latin is much harder for me because the pronunciation is often quite different from the Italian words I know. The words might look similar (since Italian is a Romance language), but the pronunciation is often way different. It's frustrating. So I need help... and probably a formal class or ten, before I develop too many bad grammatical habits.
In that case, I think I'd stay on the PhD path, since you've made it this far. BTW, did you ever watch the AMC show, "Rubicon"? My cousin works for the government now, after retiring from the military. As far as I know, he's never told any member of the family exactly what he does - not even his own sister. Last year I asked him to just give me a hint (and not to keep using that line, "I could tell you, but then I'd have to kill you."). He told me to watch "Rubicon"... and not to ask him anymore. I still have no idea what he does. But I appreciate him turning me on to a fantastic TV show. Too bad AMC canceled it.
But have you seen that show? And if so, what did you think of it??? And if telling me requires that you then have to kill me, that's OK. Like Michele Bachmann, I'm comfortable being ignorant.