Surrogacy is nothing like adoption if the parent isn't buying the child.

If you bought it isn't a possession. You own it. But that person you bought has free will, they literally cannot be bought, it's technically impossible. The relationship you have with the purchased child is nothing like the adoptive process for a child whose parents haven't had the capacity to raise them. The purchased child will silently or publicly reject the relationship in favour of the parent they lost, but the taboo against speaking out is enormous because the surrogate parents can and do withhold resources.

Purchasing the experience of parenthood is a scummy way to exploit people in poverty.

Notice that in adoption the adoptive parents are told to tell them that they have been adopted from an early age, and to explain the situation, and to enable bridges to their real parents if feasible. It wasn't like that in the past, but we learned. That's not the case with surrogates.

Listen to the video by Olivia Maurel.

Cannibalism is using a person as an object, consuming them. Modern surrogacy is a consumptive act, like buying furniture from IKEA.