Soldiering on here.
Continuing with real, experienced world bottom line/focus, only using abstraction to elucidate perceived outcomes:
When a gymnast comes down on a trampoline, the frame bends inward. Followed by it springing back to its un-stressed configuration. And the weaker the frame, the more extreme the pull/release swing.
Same deal with a violin neck, only the string is rotating around its axis (easily visible) -- circular rather than in/out, but analogous. So no matter how trivial it seems, it's there, and an integral part of the experiential gestalt. And the thinner the neck, the wider the oscilation.
PS: the scrolls of many old violins are excessively worn away from having been pressed against wooden tables, which amplify the volume (vibrations) they produce (through the neck) You can't get away from it.