I fully agree that we ought not dismiss valid ethics questions. These should by all means be discussed, and - as with any reproductive tech - they will be, before anything like this ever rolls out.

I don't think "but yeah what if you steal rich people cells and make a baby and then totally blackmail them" is quite the ethical quandary some people seem to think it is, however. It's clear to whom this is a purely navel-gazing academic exercise, and to whom this offers life-changing possibilities.