I think I may have miss worded myself if that is how you read it. What I mean is if reasons like "You will have the capacity and time for meaningful, engaged, quality adult relationships", "You can fully pursue your educational goals", "You will be better able to retain your youthfulness and sex appeal because your body will not be ravaged by childbearing and a crappy diet" etc are the reasons why your not having kid's then that is selfish in my opinion.
I still find time to have a meaningful relationship, pursue my education, and I find my body to be still very appealing. Nothing should stop people from having kids if they want them. They have there own reasons. This site to me is a page saying "Here, don't have kids or ALL these things will happen to you!!" If you don't want to have kids then that's fine. But to have to have a 100 reasons why not to have them is ridiculous. And I think most of those are silly. You can do anything when you have kids. You just have to plan more is all.