"And most of all us do not treat this 'orgamism' like a Human Being, even as we demand that the woman seeking an abortion does so. We just discard it if it fails to implant, for example."
Slave owners didn't treat their slaves as human beings. They also casually "discarded" any slave which would not obey or couldn't work any more. By your "reasoning" that means that the slave owners were perfectly justified in their atrocities.
Additionally, if you are trying to use the miserable, constant failure of an argument that abortion is no different from natural miscarriage, then I suppose you recognize no difference between murder and death by old age?