[pixl97]

So measure the risk probability and show it to me?

There are multiple ways to shred. When you get drives from the bank, they have a semi down in the parking lot doing it on site. Other companies tag each device then document each one getting tossed in the shredder. If one of these devices shows back up after destruction then there is going to be some legal hell to pay.

It's nearly impossible to tell if a disk has been erased by looking at it from the outside. But a shredded device, well that's easy enough.