Er, it's an experiment. That's how we generally do science. Experiments. To gather data. You try stuff, and see what happens as a result.
As has already been said, this is a complex and emotive issue with a lot of factors to consider. Until you do the experiment, you don't have any idea how all those factors will interact and what the results will be. That's why you do the experiment. To learn more (I won't say "to find out all the answers", it's obv more complicated than that).
Sorry if I sound rather jaded and dismissive, but this is what I do for a living. I don't think it's anything that should really worry anyone right now. The media presentations of these sorts of issues rarely help, of course.