^There are embryos that get thrown away. That is not being debated here. It is simply a fact. If they are just getting thrown away anyhow, nobody would argue against using them to benefit mankind. Even you stated that the part you disagree with is that embryos that 39/40 will be killed are created in the first place.
So…
Bush is allowing embryos to be created only to be thrown away but blocked their being put to good use. Seems kind of dumb. If it’s immoral he should veto their original creation. That’s where morality comes in. But that’s too hard to do politically so he just fakes morality farther downstream where it’s easier.