I've awritten about how childless are often also childfree in another post, as in they have made the decision to not have children because the cost (financial, medical, mental) is too high
because of that they therefore come in for some similar judgement to childfree
I haven't tried hard enough to be mum, I should have paid for another round of IVF because going into debt is worth it for the joy of being a mum, but you could try to adopt if you really want to be a mum - what don't you want to be a mum enough, its unnatural that you wouldn't try any means necessary, you are odd, you are missing out etc etc
So there are some similarities in the comments as in we get judged for not wanting children 'enough' and childfree people get judged for not wanting children at all
But I do think childfree people get more intrusive questions, like if I say that ivf didn't work that often shuts people down because they don't want to be insensitive but they would question a childfree person way past the point of insensitivity on many occasions
And like on here where its basically come to 'its okay for you to be here because you wanted children but not for those other posters who didn't want children'
So I would agree that childfree people can come up against more persistent, intrusive judgement which is probably easier for me to shut down with a detailed description of my reproductive system issues
Where else have we heard 'we don't want people like them, but you are alright we don't mean you'....