What's so selfish about not creating more rivalry for these already alive? What's so "lazy" about having other priorities in life than kids? (do you stand "near" life so you can judge what's "right" and what's "not" or do you participate in it, like everyone else, afterall?)
What about just a generally positive lifestyle, or is it "Kids or Drugs and whores?".
If you are so concerned about being "not selfish" and "not lazy" - I suggest you to adapt a few kids that are abadoned by their real parents, and not make a few more, which may turn out to be complete waste of space and resources.
Because, we learned skill sets or are taught them, and develop them into other priorities for the main reason of acquiring attention from others---namely females, do that we can procreate. Damn near everything we do, consciously or unconsciously is for attention to be given to us, so that it makes us better "picks"...we are Bower Birds, but on a higher more complex level.
It's been said that "to err is be human", well, so is rivalry...we are constantly in rivalry with each other. Our brothers, bosses, fathers, other men---if our fathers pussied out of "rivalry", we wouldn't be here. But, many haven't been taught right. So, the thinking, "why created more for the rivalry?", well that's just wimping out. Why try for the team, when someone else may get it? Why talk to the girl, she'll never pick me---my rival over there is better? Why ask my boss for a promotion, I'll only be seen as a rival to others?
One cannot go on with that type of thinking. I stand "in" life...but, I heed warnings, and see what others to do to "not" replicate them, and hopefully pass that down...
It's good to have a generally positive lifestyle...but it always seems that the people so adamant about not having kids, always have a damn bug up their ass about something---and that's not positive.
And it gets worse as you get older...I've seen 50-60 yr olds who have no kids talking about "I don't want to die alone", or "I wish I had kids", "you are lucky, cherish those who are around you, especially the young", I wonder why and how did they come to that conclusion...
Adopting kids of my own, good thinking---then you had to eff it up, by saying "by not making a few more that may tuen out to be a waste of space and resources"...See the negativity?
Also, who's today that the adopted kids may not turn out that way? I would hope not, but you've already made an assumption that having your own kids, and the outcome of them---you are too smart to know that their are no absolutes, and it's dangerous to clutch onto dogmas.
Hell, one could adopt a kid and he may turn out to be like Dexter, or not. But, ultimately...most would want to have their own kids, for the most selfish reason of all...their your blood, your genes, your kin...not someone elses.