Like so many other theories, it only becomes a problem when it is an attempt to define everyone, and I think unfortunately that is what's often done. Lots of folks want one, simple explanation for everything; unfortunately, there isn't one. There are many reasons we crossdress. Sure, autogynephilia may be correct for some. But it doesn't 'fit' for a lot of others. The last time I came across this theory, the person who initiated the thread made all kinds of 'adjustments' to the theory so that it could fit everyone in one way or another. When you constantly have to adjust your theory, there's something wrong with it.