I find it to be a much more common attitude - frequently expressed even on FR - that having many children is wrong or irresponsible.
The attitude that there is something wrong with having more than 2 or 3 children, that children are a nuisance, that adults have some kind of right to never hear or see a child in a public place, that it is borderline immoral to bring a child into a nice restaurant, etc.
I think if you can handle lots of children, great. But I see too many kids from larger families just running around with little or no supervision. Parenting my three is a full time job.
That is what I mean - and don't you dare bring them onto the subway!
There was a family of 8 kids in front of me at church the other day. It was really a surprise because I haven't seen that large a sibling cohort in quite some time. I don't even see it at church much, and I'm Catholic. And it was pretty obvious they were all by the same parents. It was cool, but kind of like looking at Amish people or something.