I agree with RomanE in that this doesn't seem all that unusual. I'm an undergrad in college right now so I don't have the monetary security, fiancee, or house, but everything else applies to me as well. There are a couple of things that could help to explain this, in my cause and probably in yours.

Are you fairly neurotypical in a way that doesn't interfere with your social life or physical well-being? Did you grow up with a middle, upper middle, or upper class family? Do you grow up in a developed nation? Are you of a racial class that is generally privileged in your area? (E.g., white in America.)

If these are true, or even just the first three, I would say it's not all that unusual. Not lower than 5%, anyway. I don't think that, given the above, it is unusual enough to warrant an explanation outside the ordinary.