I agree she should use a voice coach. Believe me, I get nervous when her voice goes up, because Im thinking, uh oh, now they are going to criticize her. And in truth, she needs to moderate her high pitch. If she were to develop better control of her voice, her message would have more weight among the skeptics and critics. Im sure she could improve her speaking voice if just worked at it and was mindful of not raising her voice.
Did you see (or like me, listen) to the interview? She was really very good. I gather the people there were highly impressed.