Mine as well.

Imagine a small enough object, like a tip of a screwdriver, or a table's corner, touching an object wrapped bubbles out.

It simply makes contact with the object - here covered with only a very thin layer of plastic - between the bubbles, and given enough force, damages the object.

With bubbles inwards, it has to pierce or stretch the now airgapped layer of plastic first.

Even with multiple layers, bubbles inside give +1 airgapped layer.