The desire for unlimited dominion over one's own body extends beyond contraception. The production of "test-tube babies" is another indication of the refusal to accept the body's limitations; so too are euthanasia and the use of organs transplanted from those who are "nearly" dead. We seek to adjust the body to our desires and timetables, rather than adjusting ourselves to its needs.
POPE PAUL VI AS PROPHET: HAVE HUMANAE VITAE'S BOLD PREDICTIONS COME TRUE?
Blarg.
With adoption, you're responding to make the best of a pre-existing, unfortunate situation: a child who, because of some misfortune, has no parents who are willing or able to care for him. He is a "predicament": he is an out-of-wedlock child who's being placed because his birth-mother is unable to raise him; or he's a ward of the court because his natural parents were negligent or abusive and have lost custody; or he's an orphan outright. The adoptive parents are stepping into this unfortunate situation in order to provide him with a mother and father. It's child-centered: it's finding a way to meet the needs of a parentless child.
In this IVF scheme, the child is deliberately created to be separated from his genetic father and mother; that is, he is begotten and intentionally alienated him from his natural parents by plan. He's brought into being in a commercial transaction to benefit adults who will pay for him. It is not centered around the needs of a child; it's centered around the desires of adults, who knowingly created him for this transaction.
It would be "like" adoption only if adopted children were deliberately bred for the adoption "market." This is actually the case in some places --- for instance, there have been baby-selling schemes allegedly in Guatemala, where women were deliberately impregnated and then their babies sold away from them by unscrupulous agencies. This is internationally recognized as unethical; in fact, a crime.