So did I.
And having read many of Sanderson's books, I am quite confused at the the article's aspersions.
Personally, I have always suspected that authors tend to write main characters who are the same sex as
they are, I am not sure why people are always ranting about "not enough female main characters".
Go read books written by women. Then complain about the lack of male main characters.
Take your pick.
Other than usually having male leads, I don't see Sanderson as particularly "sexist".