I'd guess the demographic of this group is largely democrat voting.
I've never seen a demographic. But, every childless by choice person that I know in my age group (Boomers) is a conservative Republican. That includes me.
This is a propaganda thing.
The left wants to equate the childless "normal" couples (aka DINKs) with unable-to-produce children homosexual couples.
This is about making marriage not part of childraising
As for the woman complaining about not getting a party for not having children. Nobody is throwing her a party for NOT climbing Mount Everest either.
My husband and I are 40 and 42, DINKS, and proudly conservative!
We both have nieces and nephews and realize that we don't want kids.
What irritates me the most about friends who have kids is that they think it is OK to bring their SPOILED child along on the rare event that we get together for dinner at a nice restaurant. The evening is always spent cleaning up the overturned drink, constantly shushing the child who insists on yelling to his mom every time she tries to hold a conversation, taking him to the bathroom 3 or 4 times during dinner, pulling him off the top of the table or out from underneath the table and chasing him around the restaurant whenever he escapes and takes off running. And we KNOW if we suggest they get a sitter, it will sound offensive to them.
Are you kidding? Two incomes and NO kids is great! We sure don't vote DEM either. We spend our money on ourselves, and our retirement.