1.) You shouldn't feel bad about it, and now you are realizing that it's an overall upwards spiral after all, you probably don't feel so bad about it! :-)
2.) You forget to include a lot of other things. What about sporting activities, or social activities. There was another HN post on "investing time", that explains that concept. I can tell you my spiral is way bigger. And especially Wikipedia I see as a big corner stone of learning things. It's one of the fastest ways to get a feeling for what the Bellman equation is, or convex optimization, or the different notions of consciousness, or the axiom of choice in set theory, or a morphism in category theory, Feynman diagrams, or a renormalization group, just to list a few things I've checked in 2013. I bet you could follow my intellectual spiral by the specificity of topic terms I check on Wikipedia. :-)
The world is a wonderful place, there is so much to discover! You will never be done. It's great to not just accept that, but to appreciate it!