The children would not be their own: 1 + 1 + 1 = 3 parents' DNA.
Who knows what the long term consequences would be?
It’s not a third parent’s DNA; it’s a tiny bit from a nonfertilized egg. That’s a big difference from the introduction of a third person’s entire DNA profile.
If you knew your child might suffer from a horrible genetic disease that could be avoided by some form of genetic engineering, would you refuse it?
We never know the long term consequences of much at all. We didn’t know for sure about the polio vaccine; but being old enough to have known kids with polio, I’m damn glad my folks didn’t refuse it.