The debate framing surrogacy as a 'market' implies that the product being bought and sold is children.
The artificial production of a child is an extreme form of consumerism, creating a 'market' for children. Rather than acknowledging the importance of the gestational process of a child bonding with their mother in the womb, it makes the child a commodity because the successful embryo is selected from a group of embryos on account of certain attractive characteristics that it has.
The market for surrogacy does not involve the buying and selling of children, but the sale of gestational labour. Surrogacy is not carried out because of a desire to create a genetically 'perfect' child, but because of a desire for a couple to have a child of their own that is related to at least one parent. Technical fertility innovations have all moved from being controversial to increasingly accepted over time, from sperm donation, to in-vitro-fertilisation (IVF), egg donation and gestational surrogacy. Surrogacy may also use donor sperm in which case the intended parents have no biological relationship to the baby or babies. There may be multiple surrogates, fathers, mothers, donors, and babies. It can get very complicated. Surrogacy exposes parenthood, not as a biological fact, but as a legally and socially constructed status with responsibilities and obligations as well as benefits
[P1] Surrogacy commodifies children. [P2] It is inherently wrong to create a market which buys and sells people.
Rejecting the premises
[Rejecting P1] Surrogacy does not commodify the life of a child, but rather the gestational labour of the surrogate who carries the genetic child of the intended parents that they are unable to do themselves.