I'm curious where you place organisms like HeLa cell line[0] in your personal moral framework and world view on human biology.
It seems to me that you would consider the harvesting of these cells to be immoral but also that you'd consider killing these cell lines to be unacceptable.
In your opinion Henrietta Lacks still alive as long as this cell line is alive somewhere in a lab? What if the cells are frozen? If she died what remains? How is it different from an embryo?
These are good questions. Let's enumerate the essential ones.
1. Is harvesting cells in the manner of the HeLa cell line morally licit?
2. Is killing such cells morally licit?
3. Is Henrietta Lacks still alive through this cell line?
4. How are the cells in this line different from an embryo?
(1) No, I would not say this is immoral. First, these are cancer cells. If removing cancer cells from a human body is immoral, then it would follow that removing tumors would be immoral, which it isn't, because a tumor is a defect - it deviates from the norm of a healthy, functioning body and interferes with its operation. Removing such cells is a corrective procedure. It restores the body's healthy function, which is the entire point of medicine.
Now, what if the cells were healthy? Here, it would depend on the aim of doing so as well as the impact. For example, removing cells from a healthy heart because you wish to diagnose a patient with a minor illness would be bad if doing so also damaged the heart in some way surpassing the good enabled by such extraction and diagnosis.
However, say the person in question is suffering from a serious illness, and the damage or resulting risks of such an extraction is proportionately less than the good of the life-saving effect it would enable, then this would be morally licit.
(2) No, I would not find killing such cells immoral either, because...
(3) ...Henrietta Lacks is not alive anymore than a hand severed from my body and kept alive artificially is still me. Indeed, that hand is no longer a hand, because a hand is only a hand when it is a integral part of an organism and functioning as part of that organism. If you reattached that hand to my body while I am still alive, then it would be my hand.
(4) These are not embryonic cells. They will not develop into a human being.
Now, even if we ignore that they are cancerous, you may say that such cells can be modified or "reprogrammed" into embryonic cells. Yes, they can, but that involves modification. The result of that modification would not be Henrietta Lacks, but a clone, or a distinct person with the same DNA. I would reject such cloning as immoral.
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Now, developing cell lines derived from adult cells is different from developing cell lines from the destruction of embryos, which brings us back full circle. It's the destruction of a human being in the embryonic stage that is categorically immoral.
It seems to me that you would consider the harvesting of these cells to be immoral but also that you'd consider killing these cell lines to be unacceptable.
In your opinion Henrietta Lacks still alive as long as this cell line is alive somewhere in a lab? What if the cells are frozen? If she died what remains? How is it different from an embryo?
[0] https://en.wikipedia.org/wiki/HeLa