It doesn't leak memory, but the example use case of "high RAII" isn't about not leaking memory but that "the compiler can ensure you remember to do something in

It doesn't leak memory, but the example use case of "high RAII" isn't about not leaking memory but that "the compiler can ensure you remember to do something in the future and don't accidentally forget it" and "remember to remove something from a cache that you previously added to" - which isn't actually done, because the consumer can call free and the data will still erroneously be in a cache, for example.