The bottom line with surrogacy is that you are commissioning a baby, in the full knowledge that as soon as that infant is born, you are going to take it away from the most important person in its life - its mother. Newborns need mothers. They are biologically designed to need their mothers. And yet people create babies, knowing full well that they will be deprived of this most basic need, for their own gratification.
Yes, children are adopted. Children are taken into care. But no-one pretends that it's a happy outcome. It's a necessary evil to protect the child in some circumstances, where there may be violence or addiction issues. Or where a birth mother cannot take care of a child for whatever reason. But it's still a trauma to that infant. And yet surrogacy is somehow dressed up as some kind of act of altruism, without a thought for the poor baby, taken from its mother.