In our modern era, information is most widely available, compared to any period of human history. (Almost) Anything and everything is just a Google search away. This leads to creation of two distinct and one not so distinct groups of learners:
1. Self taught
2. Formally taught
3. A mix of both at varied degrees.
For any learner, being in group 3 is optimum as they are exposed to both sides of the fence, but from personal experience, I would say most people are part of either group 1 or group 3, as in, they are either personally motivated to go scavenger hunting or rode the tides of school curriculum.