There is no morality, no merit to absorb because of consent, it may come from ignorance, and may come from the influential force behind until they were forced to undertake needed to mop up bun.
Surrogacy is unethical because it could not approve of ignorance and may come from an influential force behind as those who were forced to surrender to hold merit.
Because no ethics hold merit consent that may come from ignorance and may come from the influential force behind who was forced to agree to the surrogacy.