“It can’t happen and it would also be bad if it happened” seems to be a somewhat tempting way to argue these topics. When trying to convince an audience that thinks “it probably can happen and we want to make it happen in a way that gets it right”, it seems much worse than sticking strictly to either “it can’t happen” or “we don’t know how to get it right for us if it happens”. When you switch to talking about how it would be bad, you come off as scared and lying about the part where you assert it is impossible. It has the same feel as an 18th century theologian presenting a somewhat shaky proof for the existence of God and then reminding the audience that life in a godless world would be unbearably horrible, in the hope that this might make them less likely to start poking holes into the proof.
“It can’t happen and it would also be bad if it happened” seems to be a somewhat tempting way to argue these topics. When trying to convince an audience that thinks “it probably can happen and we want to make it happen in a way that gets it right”, it seems much worse than sticking strictly to either “it can’t happen” or “we don’t know how to get it right for us if it happens”. When you switch to talking about how it would be bad, you come off as scared and lying about the part where you assert it is impossible. It has the same feel as an 18th century theologian presenting a somewhat shaky proof for the existence of God and then reminding the audience that life in a godless world would be unbearably horrible, in the hope that this might make them less likely to start poking holes into the proof.