But you're the only one that is going to suffer from the situation. She's envisioning her in a McMansion with New Guy and you in a 2-bedroom apartment with Ikea furniture.
She wants the man in her life to be the head of the household, to LEAD her, to take more of the burden of the big picture so she can focus on the details. She'd rather have a nanny than a stay-at-home husband who makes less money than she does, I'd bet.
Anyway, it is a fair point to make, but she's in the mode of chasing a dream that would make all of your points completely irrelevant to HER.