We are not in a bubble, we've always been fascinated with stories of fantasy, going back to Greek mythology up to the fairy stories of Hans Christen Anderson, the tales of space and lost worlds by H.G Wells and on to the modern paperback era from Robert E. Howard's Conan stories and H.P. Lovecraft's mind bending Horror sci-fi/fantasy on to Tolkein and the explosion of fantasy books in the 70s and 80s (My personal favourite being David Gemmell's books) - All of which stem from our inate desire to either escape to another place and time or to lend character to our observations of the world and dramatically guess what might have have happened in ages past or what may happen in the future.

It's all very human, and thinking about it I reckon the question in the original post is a bit bloody daft. Most of humanity lives in a fantasy bubble.