It appears that almost all of the main heroes are orphans in one way or another. What's the deal with that? Is there some kind of written rule that heroes has to be orphans? I mean just look at the lists:
YG, GJ, ZWJ, XF, LHC, on.. and on.... that's just in wuxia. In foreign genre, we see the same thing.
Spiderman, Hulk, Superman, Batman, Harry Potter, Luke Skywalker, Eragon, on and on... are all orphans...
This is particularly true with genres that deals with supernatural powers. Are there any main heroes that aren't orphans?