A very interesting question and I’ll be interested to hear everyone’s opinion.
Do I agree? Well.. I write urban fantasy and urban sci-fi so I guess not 🙂 But, that said. I do write about ordinary characters who are thrown into extra-ordinary situations, so maybe.
But I almost think that it is fun to write about something that is completely different to your ordinary life. To just make it up as you go along. But I do always seem to write about characters who are more than a little driven and ambitious… so maybe ‘writing what you know’ creeps into your writing no matter what genre you write in.
Mind you, I’m always in awe of authors who write about characters being terminally ill or growing up in violent households. I don’t think I could ever do that. I don’t think I could do the hard issues justice.