Tricky subject really. I think things have changed massively since my parents generation where the norm was marriage at an early age followed by kids.
The OP is saying that she finds it upsetting to read how women are selfish for not wanting kids, and I have to say there are a fair amount of comments in this thread saying exactly the same thing about men.
As a man I can understand that a guy who has kids from a previous relationship may not want to have more with a new partner. I certainly wouldn't because I question whether I could support more. But then I wouldn't get involved with a woman now who wanted kids as it's unfair to her.
From a man's perspective, modern life involves me ( as well as women ) being bombarded with images of impossible women. My drive to work takes me past several massive billboards with women in their underwear ( M&S ) . It's all around and I think as well as causing problems in terms of women's self image it causes as much a problem to men in their image of women in general. I guess there is no revelation there.
And I think that causes problems in the context of starting a relationship that is clearly going to involve a new family with older women. I know that sounds harsh but I think that's a reality.
I don't think the OP is being unreasonable. But I think we're all saturated by the 'ideal' , men are looking for an impossible woman and women are looking for the impossible man. Time ticks on, men decide they're happy playing with sports cars and FHM magazine and women ( some ) end up childless in their 40's.
For the record, my XP became pregnant at 41, I was 40 but neither of us planned it. Just the sort of 'recklessness' and passion that plagues teenagers except we were adults in our early 40's.
I had no plans for children, but I'm delighted to be a dad.