Some women choose to do it. Some women choose to be sex workers.
They're the ones you hear about. They're usually in pretty advantageous positions that enable them to make it a choice.
The reality is that most women who rent out their wombs or their vaginas, at the risk of all sorts of permanent injuries and changes including death, aren't doing it because it fulfils them and is their dream. You don't want to hear from those women and lucky for you, you won't. But all of them, by choice or not, are dehumanised and erased as "gestational carriers" and "just carriers, that's all", to give just a couple of the phrases used to justify using them as incubators to grow a baby to order - and take it away.