I don’t see how this question reaches the level of patronizing. Kids take time. Not having them frees up that time — OP is curious how people spend it. What leap of logic am I missing?
That, coupled with the question, offers the implication that they already know what the answers will be and simply want validation that the way they spend their time is superior. That's textbook patronizing.
OP may not have meant it that way, but it's pretty easy for it to come off that way, hence why the question sounds kind of patronizing.