This, from Andy Weir in his By the Book column at the New York Times, seems like an odd thing to say:
For the record, my stories are meant to be purely escapist. They have no subtext or message. If you think you see something like that, it’s in your head, not mine. I just want you to read and have fun.
#1: It’s not odd for an author to want his books to be purely escapist and fun. It is odd to insist that they have no subtext or message, and further, that if readers detect those things they are wrong.
#2: Not all subtext is intentional and not all intended “messages” are received by the reader.
#3: Authorial intent dies once the book hits the shelves.