Community is build around anything that is difficult to understand and/or it has multiple usage.
The knowledge is built over the period of time by multiple people. We individually capture the small portion of overall knowledge and interact with it. If you really are into exploring, you can explore anything. Putting the knowledge in one's head slowly is like taking a spoonful water out of the ocean, one at a time. But we may have to do it. We are knowledge workers. We then like the knowledge that entertain us. Let it be exploring and tweaking the knowledge we gained. It could be in the form of new learning or poetry or obfuscated code. Mind in general has millions of information of this sort and we keep on adding to continue get entertained.