Is there an argument of coupling something to a large mass limiting vibrations in the first place due to increased inertia?
Coupling something to a large mass wouldn’t limit the propagation of vibration because of an increase in inertia. At least I can’t see how it would. Take a big lump of concrete, say a few cubic meters, and hit it with a sledgehammer. The energy imparted would not be sufficient to overcome the inertia of the lump of concrete and cause it to move (or rather change its velocity) but still a wave of energy (vibration) would propagate through the concrete.