Bubble envelopes are all wrong? Flipped bubbles would make it harder to slide objects in and out of the envelope, but they would reduce movement inside the enve

Bubble envelopes are all wrong? Flipped bubbles would make it harder to slide objects in and out of the envelope, but they would reduce movement inside the envelope. The difference seems minor other than the ability to tape the flat side, and we have cling bubble wraps that don't need tape anyway.