99% of what you learn will not come from a HH post. Sure, at the beginning they will really help solve some major, obvious leaks. And sure as you get more involved in theory and gain experience they will help with figuring out thought processes within the hand. But your right, having someone tell you to fold to the turn bet because someone is a Tagg by stats alone is not going to take you much farther than $50NL.

It's not the answers that are the problem in most of these situations though. Some of these threads by ISF and Spoon have sparked some much more in depth questions than any HH post has ever done.