Well, not everyone who wants a child through surrogacy is infertile first of all, but since we're discussing infertility....
I do think society has a problem with how infertility is framed which it would be much healthier if we could address rather than exploiting women and selling children. Women are still somehow seen as 'less than' if they don't have children and when I was suffering through 7 years of infertility, everyone was always pushing me to the next step of 'treatment' or a 'fix'. I eventually gave up when I decided I ethically didn't agree with using donor eggs.
I wish that I had been put in touch with some amazing childless women who could have shown me that there is life beyond the desire for a child. One woman did say to me something along the lines of 'yes, I really longed for a baby in my late 30s and early 40s, I think it was biological, but that intensity of feeling passed and now I am happy'.
Of the women I met when going through my infertility journey, some have remained childless and they are the happiest of all my friends. None of them has a life without children in it, they are the favoured beloved 'Aunts' to many of their friends children. One friend in particular regularly has her nephews and nieces to stay (her lucky sister) and is in the lives of many other children in a meaningful way. I can already see that my DD1 will always want to spend time with her over me and I can see a time when DD1 might confide in her over me. It's a different relationship. Because I have two kids and no family support, I could never make time to be that kind of adult presence in the life of so many children. I'm a tiny bit jealous sometimes, to be honest. It's not the same as being a biological parent but I often wonder if it's actually better. She is very happy - she has way more money, an interesting rewarding career, and lots of lovely holidays. And when she wants children in her life there is a line of children eager to spend time with their fun Auntie (who isn't busy doing all the shitwork to provide clean clothes / food).
I think there is a biological drive to have children, but if women can't I really don't think it's healthy for anyone to have this attitude that they must have a child no matter the costs. It is possible to be in the life of children in a meaningful way even if you don't have them yourself.