Best thing to do is buy straight from manufacturer if possible require insurance on the shipment—that way the post has to deliver it or they are paying you!
If they want to purchase insurance on their package, that's their choice. On the flip side if they want to "self insure" by not doing so, and assuming that on average they would pay more for insurance than insurance would pay them, that's also their choice.
Either way I'm certainly not going to purchase insurance myself, paying extra money to mitigate their risk.
They even screwed up and shipped a cancelled order, I was on the other side of the world when I saw the e-mail and by the time they were satisfied I really was me their attempt to intercept the package failed. $500 worth of stuff sat on our front porch for 10 days and was still there when we got back. (We live in a low-crime area and our front porch makes it basically impossible to see a package from the street unless it's large. A porch pirate would have to come to within 10' of the door to see most things, they'll go elsewhere where they don't have to be so obvious.)
One of the early-on Prime benefits for me was fairly deterministic delivery. At a time when I ordered lot of physical books, CDs, and DVDs, the minimum amount for free shipping wasn't a big deal. But random order arrivals when I was traveling much of the time were.