Let's get up off our knees, stop cringing before bogeymen and virtual fathers, face reality, and help science to do something constructive about human suffering.
Suffering is a byproduct of evolution by natural selection, an inevitable consequence that may worry us in our more sympathetic moments but cannot be expected to worry a tiger - even if a tiger can be said to worry about anything at all - and certainly cannot be expected to worry its genes.
Blindness to suffering is an inherent consequence of natural selection. Nature is neither kind nor cruel but indifferent.
For me, moral questions such as stem-cell research turn upon whether suffering is caused. In this case, clearly none is. The embryos have no nervous system. But that's not an issue discussed publicly. The issue is, Are they human? If you are an absolutist moralist, you say, "These cells are human, and therefore they deserve some kind of special moral treatment."