For you to say this means you do not understand the basic function of resonance in general and in Music Reproduction Systems in particular because that is not how naturall harmonic resonance works in any way at alll.
"Vibrations go up the cantilever, to the motor (coil or magnet) which being much more massive reflects it right back down to the stylus, which being light can only dissipate this energy by bouncing and hitting the groove walls."
The bouncing part is very funny you have a fertile, active, free spirited imagination!
Bouncy bouncy! Funny!