Simply, the market and trading/investing will be much more stressful and require more study than had you gone to school. Thus, you must become a student of the market that will require learning, memorization and self-explanations...more than any school will require.
There's a motivation aspect that is very dependent on the subject at hand. My school system (Québec, Canada) has failed me as well, and I was out after one year of college for lack of interest in the mandatory subjects and the way they were handled. I can and do, however, gladly spend 80-hour weeks on subjects for which I am passionate (software engineering being one, trading being another).
I realize that's in essence what @d08 and @zenon12 already mentioned, so I guess this is more of a "me too".
whether one likes authority
That's a very good point. I've been an entrepreneur since 1996 and the handful of times where I tried truly working "under" someone weren't pleasant experiences for me, so I ended up earning less on my own to keep that freedom to choose and manage my own projects.
Markets are WAY different now. I don't follow Zanger, but from what others have said on here, he might have been a one hit wonder.
Ah but that's the age-old saying: "everything's completely different now". We hear that with every new generation, and I'm not even talking about trading per se. Politicians idealize the world as they saw it when they were 5 years old (and it's funny to hear the same argument from 40-year-olds and 80-year-olds), when they were protected by their parents and had no worries, right now traders from the 80's-90's say the algos screwed everything up... Fact is, there'll always be people with the right mindset at the right time to succeed, so just because we can't make heads or tails of a changing world doesn't mean nobody else (probably younger) will.
