As someone who has a lifetime of child free living by choice, let me weigh into the fray here. (FWIW, I'm 50 years old and have been married 17 years. Neither of us wanted kids and want them even less for every day that goes by. We also have dozens of friends just like us and we have wonderful lives.)
That being said, we're not offended by what he's saying. We just think he's stupid. It's like your 8 year old arguing with you. Why get upset about it? Everyone like me has ran across this guy dozens of times. They're perfectly normal and then they have kids which makes them think they're on a higher plane of existence. In reality, they're just the same person they were before but now just arrogant. We hear all the same phrases like "you'll regret it one day," or "who will take care of you when you're old" or "you don't know what you're missing," blah, blah, blah. The people with kids are always trying to convince the people without kids. It's never the other way around. It's like they're trying to convince themselves.
Having kids doesn't make Vance original or a deep thinker. His views about it make him a walking cliche and it's one I've seen repeated over the years.