So your argument is: you have a problem with people defying "nature" to reproduce. How is that a problem? How is that wrong?
People shouldn't use cars because it's defying "nature" to avoid using their legs. I can't imagine what the gene pool will be like after a few generations of this. Fat people who can't walk will take over the world!
Well guess what, being able to walk a long distance on 2 legs is a non-issue when you have cars. It's irrelevant.
And "nature" is not your mom. Or mine.