There's a lot of people in the trans communities who can't seem to understand that their experience isn't necessarily everyone else's experiences. For example, I know one well-known CD who thinks TS are merely buckling to society's pressures to conform to the gender binary, rather than the "right" way (i.e. her way) of accepting that they've got both masculine and feminine qualities. Which is just as short-sighted as TS folks who are dismissive of folks who are "just" crossdressers.
Anyway, as others have said, just because someone is a "professional" and/or puts in writing doesn't mean they necessarily know what they're talking about.
Personally, I've found some of the literature (more so books than internet) to be quite insightful, and some of it BS. Ultimately, you have to decide whether it's relevant to you and your circumstances.