I don't personally know any mother's of large families and not being a mother I probably can't make an intelligent comment about this subject. But I have had the experience of being a single parent of 4 adolescent children. I wish I could have gotten the older ones to help with the younger ones (4 in total each 2 years apart). Maybe that is my fault.
I remember when they were born (of course they had their mother then). One was easy, two, twice the work and three - well that was the straw that broke the camel's back. Anything past three seemed it didn't matter as we were already in no mans land :-).
I'd imagine any mother of more than three has no choice but to be content and not easily agitated or they would go insane! It's probably just a survival technique that takes the phrase "count your blessings" to a literal extreme. Being a man and sort of having been there I'm happy to give them the benefit of the doubt and not hold them accountable for a lack of empathy toward those who have smaller families. It could just be their way of coping with the hand they are dealt (or drew). When I think of what it would be like to have that big a family I wonder if I would have the strength to endure the greater possibility of tragedy or adversity that comes with raising children. God forbid that I might outlive any of them...that would be hard.