I've given tons of unconditional love as a child, I've seen it being received by many peers with kids, and hopefully will experience some of it with my own. Even if not, it is still very much worthy for me to have them.

Create life, an unique being which is a mix of you and your partner. Nothing else in life comes close to proper achievement in life, be it professional or personal (and I've achieved much more than was expected from me on all levels).

That's me (and many many people around us who already have them, lives are changed forever and for the better). If one doesn't want them, that's perfectly fine, find your own drive. But raising kids ain't some ancient, obsolete un-cool goal/achievement, in contrary.