I think its specific to the field. For education, it is recommended that we get a PhD in Malaysia or at least a masters. However, for accountancy, its not as relevant. Then again, I agree with how your husband sees it, its good to explore different fields and venture out, after all being knowledgeable doesn't mean that you are wise and even though I am studying my PhD, I still seek advice from people without PhDs or even a degree but are in my opinion, full of wisdom