Quite right, chum. Think of it as biennial continuation training and help the other pilot to progress in those areas requested....
The problem started when some ex-CAA Examiner wrote down what he thought should be the 'recommended' content of the 'dual training flight' without bothering to refer to others in the industry. It was more complex than a revalidation proficiency check and would have taken far longer than an hour to achieve! Fortunately, the content wasn't mandatory, so those with commonsense were at least able to ignore his 'recommendations' and do something beneficial.
But the fact remains that if the other pilot was dangerous enough to oblige you to take control, don't sign the logbook!