> people who choose to be child free are not complete human beings

Hmm, this seems pretty condescending, but hopefully it is just in jest.

With four kids I understand there is a unique set of skills and emotions that come along with it and I am personally grateful for, but there are also a lot skills and emotions you won't have and experience if you never go to war, never become a leader, never experience losing a parent when you are young, never win a gold medal in a team sport, never live in a different culture, never volunteer, etc. It seems short sighted to claim someone is an incomplete person if they can't experience one of those things, because likely no single person can.

There is a great tapestry of human experience and we can only experience most of it second or third hand (and probably not even that in most cases).