Made a video in regards to the comparative lack of fan theories.

There's a lot of stuff I tried to cover here, but I think the biggest one is that Fan Theories don't make themselves. Even then it's very hard to get those theories out there, but when you consider how Anime Youtube has been growing recently due to people realizing how easy it is to get your thoughts out there (eg. Pause and Select, Pedantic Romantic), there's definitely a platform on Youtube for this sort of thing. Nerdwriter1 even did a damn TED talk on how the video essay is seeing a resurgence. https://www.youtube.com/watch?v=ald6Lc5TSk8