> A set of plastic bumpers inside the marked box. I get it: these hold the relatively gentle device in place while it's shipped. The bumpers are clearly intended for only a single use: they're shaped to fit only the particular device I bought. Why haven't we developed reusable dampeners that can fit a variety of products and used repeatedly?

Because those would be harder to make and more expensive and likely work worse, and the benefit would go to some third party, not the company selling it. You could legislate it, but otherwise I don't see companies spending the extra money and time willingly.