The author of this essay does ultimately come to the conclusion that writers should be willing to write from perspectives outside their own, and lists a number

The author of this essay does ultimately come to the conclusion that writers should be willing to write from perspectives outside their own, and lists a number of positive examples of such writing. The question he seems to be wrestling with is where the boundary is in his own mind between doing so for right or wrong reasons. It is not as obvious as blatant ill-intent: the desires for fame and commercial success, while perfectly reasonable on their own and necessary for a writer who makes a living from their craft, could blind the author to ways in which they fail to do justice to the experience of others. My guess though is that for most authors the problems of ill-intent are rare, and that a failure of execution is far more likely the real issue. Writing believable characters of any stripe is tough work.