I agree that her investing advice leaves much to be desired, but then so does Dave Ramsey. I think part of the reason is that they have to appeal to the lowest common denominator within their audience, so they have to make their advice overly simplistic, and they probably cannot dole out specific investment advice due to liability issues.
Could any of us do better if we had to broadcast a weekly TV/radio personal finance show? I cannot begin to imagine the amount of criticism I would receive with the advice that I would provide, so I cannot be too harsh on public PF personalities either. At the very least, they're getting people to think about their finances, and driving a little bit of traffic to sites like this one.