Creating embryos in a petri-dish reduces human life to a commodity to be experimented with.
It separates the unitive from the procreative, and many embryos are killed in the process
Yes, IMO, that's the more important issue here!
The related problem is that you're still using the first embryo as an experimental subject, without any of the safeguards essential to its moral status as a nascent human being.
The third problem is that the entire process of ovum extraction, sperm collection, in vitro fertilization, and so forth, has already reduced human procreation to an laboratory procedure resulting in a product who/which is a commodity in commercial transaction.
The entire distinction between a human being, a lab animal, and a bit of biological property is in smithereens.
So we (Americans) are right back where we were at the time of the Dred Scott decision of 1857, with the law unable to distinguish between a human being and a piece of property. Except at a potentially worse degree of complexity, since the human genome can now be altered through the introduction of heterologous genes, and the embryo manipulated into forms of abnormal development, so that distinguishing between "human" and "not-human" becomes almost impossible.
When Aldous Huxley wrote "Brave New World," he assumed --- didn't he? --- that people would want to prevent this from happening. There must be somebody out there who is thinking strategically about how to stop this whole race to total depersonalization. I think it should be done. You'd have to start by banning IVF. Lord. I almost despair of the possibility.