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Why does gene editing of human embryos raise ethical concerns?

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A step-by-step diagram shows donor DNA and vector DNA cut with restriction enzymes to create overhangs, mixed and sealed with ligase to form recombinant DNA, which is introduced into bacterial cells. The recombinant DNA replicates as the cells divide, producing clones. — biotechnology Steps involved in the engineering of a recombinant DNA molecule.

The gene editing of human embryos, particularly through technologies like CRISPR, raises profound ethical concerns because it involves germline modification, meaning changes can be inherited by future generations.12

Key ethical issues include:

Unintended Consequences: There are significant unknowns regarding the technology; scientists may unintentionally introduce genetic errors while attempting to fix others, posing risks to the health of the individual and their descendants.12
"Designer Babies": Critics fear the technology could be used to enhance non-medical traits such as intelligence, physical appearance, or athletic ability, leading to the creation of "designer babies" and raising questions about the morality of tampering with human development.13
Equity and Access: There are concerns regarding who will have access to these advancements, potentially exacerbating social inequalities.12
Human Dignity: Some argue that designing human beings violates human dignity, as it treats individuals as products to be engineered rather than autonomous beings.45

Ethically, it is imperative that we prioritize human safety, autonomy, and the preservation of our shared genetic heritage, ensuring that such powerful tools are not misused to compromise human diversity or dignity.6