I looked up the definition of "hobby" and got this: "an activity or interest pursued for pleasure or relaxation and not as a main occupation" So yeah, it seems

I looked up the definition of "hobby" and got this: "an activity or interest pursued for pleasure or relaxation and not as a main occupation" So yeah, it seems to fit the definition. Remember, these women aren't doing this as part of a marriage or other relationship with a partner, they're doing it all by themselves. Unlike other people who usually find a partner to procreate with, and then share the duties and responsibilities of child-rearing, these women apparently are unable to maintain a long-term relationship, but they have plenty of money, so like some people like to buy expensive pets, these women get IVF and have a kid, and then hire a full-time nanny or au pair to raise it since they're always busy with work, going to the bar, going to cultural events, hanging out with their single female friends, etc. But for that minority of time they want to feel like a "parent", they'll have the kid there and can do something with him/her. Sounds like a hobby to me. Not too different from some rich guy with 30 cars in his garage, and he might take any particular car out for a spin once a month or less, but he can afford full-time mechanics and detailers to take care of them in the meantime.