Probably everyone realized it, but anyway: Wasteland might be a very ... particular RPG title with it's view perspective, etc., but it's an RPG, and we've got how many of those every year? Fallout, Skyrim, Witcher... Demon Souls for the more hardcore... Diablo for the button smashing aficionado... A number of D&D titles, etc. While, besides Telltale games, no one is making Adventures.
And then again Double Fine raised US$ 3 Mi without a sweat and Wasteland 2 "only" US$ 2,5 Mi.
I know that, on one hand, not having such titles make it more rare so more people would want to buy/invest on it, but man, how many fans are out there? Adventures are pretty much alive if you ask me. (you didn't. I know)