Well, then, the answer to your original question is simply: IVF is a shibboleth to the Left. The Left likes things that remove procreation from the natural union of man and woman. Even if 99% of all Dem-voters couldn't afford it, it still gives them a nice, warm, fuzzy feeling to imagine circumventing the Natural Plan.
And for gays, specifically, it is a "dog whistle" for "You lezzos don't need no damn MAN to get pregnant!"
Satisfied with my response, philippa?
Regards,
I am, thanks.