I do agree this is not an issue "to agree to disagree." IMHO that's the height of hypocrisy by the left because lefties never take a libertarian position to "agree to disagree" when they disapprove of conduct. Have you ever heard a leftie advocate "agreeing to disagree" over smoking bans, stream levels for fish, building highways, allowing Horowitz to speak on campus or snowmobiles in Yellowstone, just to name a few?
IVF is not the cannibalism upon which the essay tried to focus, though the IVF process is not pro-life since it makes a mere commodity of the embryos, allowing for extra embryos to be conceived and manipulated as if commoditries not individual human lives; the IVF process is very dehumanizing for the embryo age of individual lifetimes.
The slow dehumanization of conceived individual human life had, as an important step in our society's acceptance, IVF as a way to assist pregnancy achievement. The process, however, conceives individual human lives in a petri dish(embryonic individual human beings), manipulates these individual humans at their earliest age in their individual lifetime (embryo age), implanting several at a time to try for at least one pregnancy. Additionally, 'extra' embryonic individual lives are stored in freezers and some are sent out to research facilities to be 'sacrificed' for science.
The cannibalism arises when the embryos are conceived then used for research or direct treatment of other individual human beings (as in the extras, or in the case of a NJ company, conceiving new embryos specifically meant for dissection and harvesting). IVF is already sustaining a degree of cannibalization, by providing embryonic individual lives for dissection and 'harvesting' of stem cells for research.
The scientist mentioned in the essay intends (by his own admission) to conceive a copy of his daughter, a clone of his daughter, but not allow that new individual life to reach birth age; he intends to clone then harvest the body parts of the clone, cannibalizing the alive cloned individual being to get the cells he deems necessary to treat his daughter's malady, killing and discarding the clone in the process. That is cannibalism, as surely as if the scientists handed the stem cells to his daughter to have her eat them for a cure, or eat the entire embryo for a cure.