It’s a funny thing that “college education” isn’t what it once was, but it’s also considered to be an absolute necessity for anything beyond pure entry-level and below-subsistence employment. That is curious, isn’t it?
With that said, I would encourage her – as I encourage everyone when I discuss this topic – to never stop learning, whether that involves “getting a formal post-secondary education”, including credentials to show prospective employers, should that ever be necessary, or simply continuing to improve her own mind through whatever means she chooses.
It is ridiculous to expect that every woman who wants to become a full-time mother and homemaker – and there certainly are places for women who want that! – must have a formal, credentialed college education. It is also essential, in that case, that she get the full benefits of a first-rate high school education, which is up to her more than anyone else! – and not just “serve time in high school until she can escape”. She should be able to write and speak clearly and appropriately for her age; compute easily and perform basic mathematics without needing a calculator to perform simple operations; understand and be conversant with broad history, civics, world religions and cultures and in short “be fully educated” as a high school student… and then not think she can chuck it “because she doesn’t need any of that”. If she’s going to be a full-time homemaker and parent then she needs every bit of that, and she needs to continue to expand it so that she can raise intelligent and aware children, too.
If she’s going to be a full-time homemaker and mother then she should clearly have some form of education in those skills – however she acquires them! – and she’d better be a good cook and housekeeper and understand what is involved in being a mother.
I never argue against education, but it can take many forms, so I frequently argue “against the formality and cost of a college education that is contra-indicated”. Your friend may be one such person. But she would also be foolish in the extreme to think that she will live her life like the end of a fairy tale: “happily ever after” when she meets and marries the prince. Princes often tire of their princesses, and there is no doubt that one will tire of a frumpish, ignorant and television-addicted “old lady” who can’t even engage him in conversation about anything outside of “what the kids did today”. (Not that that’s unimportant.) So her continuing education is mandatory, but what form it takes is up to her.