So it should have been a family member, in fact Catherine who should have offered.
She was offered Sophie as a mentor, wasn't she? Supposedly? Sophie would seem to have been supremely qualified for the role. Though she probably now thinks she dodged a bullet there. Of course Catherine had more than enough on her plate at the time.
Re the Queen having 'the right people around her', I suspect that was a dig at Angela Kelly. H. didn't like her because she stood up to him over the wedding tiara affair. 👍 It's discussed in FF.
The arrogance of thinking, firstly that the Queen wasn't well able to look after herself, and secondly, that he was better able to protect the Queen (If she had needed protecting) than her own husband and daughter, both of whom were more than capable of expressing an opinion.