I have a problem with rolling over and accepting made up rules to put it simply.
The more that we accept creep like this the greater the levels of unneeded regulation appear. If the CAA felt that we needed a 'test' every 2 years then they would change the regs and require. In just the same way that I renew my MEP and IR by test every year. Instructors who think think they have the right to impose rules where they see fit on contradiction to the regulator just do the industry a disservice and are one of the causes of decline in GA.
I prefer to give people the freedom of choice and what is interesting is that unfailingly we do the general handling stuff that they never practice on their own. But that is the result of freedom of choice not me imposing my rules on them. Believe it or not the vast majority of people are actually capable of making good choices on their own.
Perhaps the attitude of these schools and Instructors insisting on setting the rules and and contents is why I do many hundreds of hours of Instruction and hundreds of licence signings?