It's hard to tell from the article what was actually said or meant. But to be fair to Mayer, Paltrow sends out a weekly newsletter (Goop) that contains lots of bad dietary advice, such as "toxin cleanses," and other pseudoscientific nonsense. She could have meant literally that Paltrow is uneducated about food and her food advice is harmful, so she didn't want her associated with Yahoo. That's certainly what I would meant done in Mayer's position.