Because it's older and more established. Therefore there are more pages on the Interwebs referring to it.
It used to be the case that if you searched on MSDN for "web service security", you'd find articles on WSE. That doesn't mean that WSE is not obsolete, and that nobody should use it unless they have no choices.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.