The problem is that there's no way to know whether your search process is going to terminate in a path from what you understand to what you don't understand, or if it's just going to wander around in specialist subjects, each referencing each other, with no obvious way back down to non-specialist topics. Or, potentially, no way at all. For all you know the "explanatory links" on a given specialist topic actually point to topics that are yet more specialist.

My dream someday is to see these things organized into a "lattice", where links are clearly labeled as going "down" or "up" the lattice and you can have a clue what's going on.