I disagree with my roommate about not calling her daughter 'smart' because it would be too much pressure for her to live up to.
What was the main thing that bothered you about her comment?
That it made little sense because if she tells her daughter she is smart it will give the girl a sense of pride.
Parents can be really sensitive about getting advice. Best thing you could do is wait until you can communicate your concern  at a time when your friend won't feel you're judging her.
She wasn't taking my advice. I think she could be getting into a bad situation doing that. I don't care if she's offended right now.
It is okay to be concerned, but it will not make her want to listen to you if she is offended. It you talk to her sensitively, it might help convince her to see your point of view.