One thing that may not be visible from outside the profession is that there are a lot of steps in between air-hockey tables and the research frontier, especially for the part of the frontier that gets the most press — black holes, Large Hadron Collider stuff, quantum computing, etc. Wanting to understand any of those things at a level better than (bong rip) man, like, quantum mechanics, dude, requires systematic study. Doing that entirely on one's own might not be impossible, but it's damn hard.