I mean, is it? I'd say anything above 2 (the number of parents around usually) is "a lot of kids". Anything above 2 and you start running into the problems I listed. In this society, I think most people who want more than three or so are narcissists who want to be praised as super-parents and/or highly impractical (or just happen to be extremely wealthy). My whole point is that, there's a fun fantasy around having lots of children but it comes with huge cons for the kids themselves in today's society.