Why does it have to be an extreme?? Why can't I choose what to and what not to talk about with my kids, without being told I'm not progressive enough with my answers, at a certain age?? Some people tell their kids WAY TOO MUCH, and it backfires, and that's from experience.
Why can't you children choose what questions to ask? I am not suggesting that you bring up the topics; I am simply asking what is the harm of answering questions that your children have? I think the harm of not answering questions that children ask is that you remove the incentive of asking questions (they want the knowledge; they have observed something and are curious; the knowledge is a reward for them).