I'm told that, on one occasion when Stephen King was asked why he wrote horror stories, he replied, "What makes you think I had a choice?"

I write what I write. Yes, everyone gets those "When are you going to write a serious book?" questions (possibly except literary authors, who are probably asked "When are you going to write something popular?")

It comes with the territory. And it comes from folks who aren't in the business not knowing what to say to an author. They're fumbling.