Two things come to mind as I read this. The first is: I’d be very interested to know what the mind of the Church is on this because I’ve never heard it discussed even in theory.
The second is: the people who are rushing forward to do this have, of course, no interest in knowing the ethics. They’ve got funding! And besides! What could it hurt?
Much of our technological change has that curious lemming-like quality. It seems to matter far more that we rush forward than that we know where we are rushing.