Here is a pro "recording piano" argument:
If the normal output of a (mechanical) piano was being recorded by any means (laser reflection, microphone, microwave diffraction, parralel induction by the strings) then the instrument is a (mechanical) piano.
However the audio output of a recording piano is not what is (normally) being recorded.
The recording piano creates output that a (mechanical) piano doesn't.
The recording piano is specifically designed and used to create patterns of electrical current that signal key and pedal position changes.
If a piano is designed specifically to create electrical signals when played then it's not a (mechanical) piano.
Even changes in the the way that the strings are stimulated change the name of stringd keyboard instruments - a piano that creates sound by electromagnetically vibrating strings is not a (mechanical) piano but rather a "electric piano".
(The name "recording piano" creates a false impression that the piano itself records. AIUI this is not the case - the piano is only part of the process that codes the piano key/pedal movements to holes-in-paper. But "recording piano" is the accepted term for such an instrument.)