“Have no idea what you mean by “no matter how well you breed any surviving offspring.” This is about NATURAL selection.”
Natural selection is slower and less certain than artificial selection. If artificial selection can’t get the job done, then natural selection certainly can’t. I thought that was clear.
Nevertheless, the topic was "Natural Selection."
In any case, Natural Selection is, of course, slower and less certain. But it gets the job done. Just takes hundreds of thousands of years.
Regards,