Regarding the use of fetal cells for #2 (playing devil’s advocate here), such cells are used in the chemical process to CREATE the vaccine. Are such cells even chemically present in the final product? Or are the cells chemically changed/extinguished in the process? Just asking questions.
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Example: Cremation is sinfully desecrating bodies. But once a body is burned, and the ashes are put into the ground, is not the body chemically gone? The body was chemically altered when it burned, especially if it was mixed with some chemical additives, so can’t one argue that such ashes aren’t “sacred” anymore?
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Just like if you want to burn holy objects that are broken, once you burn them, the natural essence is gone, so is the blessing attached.