Xenotransplantation is using nonhuman animal organs in transplantation. many people are against this practice. what would be the best argument for why xenotransplantion should be accepted?

One of the common arguments why the process of transplanting non-human organs which came from animals may be considered as an ethical act is that antigens on the surface of the non-human organs are not significantly rejected in the process. Although its research is still substantial, it is still considered as a matter of ethical issue.