I would kind of look at it as the more they have the more love they want to give. I have two and that's probably our limit (well it is unless something happened and it was an accident, then we'd have 3)!! But, if I had all the money I needed, and support and knew I could still achieve my dreams then I would have a few more. We only get one life and I think having kids is one of the best parts of it. Imagine when the kids are grown up having huge family gatherings, (that's my idea of bliss) the more the merrier I say!!
Also i don't think we can judge others and just assume they're not happy, or their selfish or whatever. We never know what other people are thinking unless we live with them 24/7, and even then we can't know exactly. I think it's nice when people have more than one or two these days. reminds me of when I was growing up, it was so "family" back then. I loved nothing more than going to friends houses who had lots of siblings, and just slotting into their family. And vice versa, having friends of ours over (there were 3 of us), it just always felt so right, having lots of kids around. I would like that for my family, but space and money just doesn't permit at the moment.
xoxo