And, by the same logic, a mag release is not a mag stop. Or is it?

Terminology is less important than function. Releasing a locked back slide using the STOP is an acceptable and often preferred method for closing the slide. It sometimes requires some adjustment to the lever to work easily.

Let’s not be narrow minded. It’s fine to choose the method you prefer, but to state or infer it is the only (approved) method is beyond silly.