My kids are hitting 30 now and I am adjusting to the change between being more of a coach than a teacher. They ask me questions about their work but mostly how to fix boilers and practical issues. I have pizza and walk with my son every week. It is in this place concerns are aired and discussed.
My wife and I most definitely guided them through their childhood and youth. You wouldn't give a child a car with no training. We all learn from someone or some media. My family provided for me but were not very close and they taught me very little. The fact you are asking this question Michael shows me you will be a big help to your children.
I think kids start to ask more complex questions around the age of fourteen. Maybe it's now their turn to find out, maybe it is still our role to guide them.
Thanks for your answer.