I would say that it's one thing to regret that you could not do something, and another to regret that you had children. It's a matter of opportunity cost. If I

I would say that it's one thing to regret that you could not do something, and another to regret that you had children. It's a matter of opportunity cost. If I have two events I'd like to attend that are at the same time I can regret not attending one whilst enjoying the one I did attend.