[SoftTalker]

Smashing the disk with a hammer takes seconds. Or dropping it in a shredder.

Used disks are not worth hours of time to overwrite with random data. Just physically destroy them.

[DarkAtom]

Or a furnace. That usually leaves no trace of the physical disk having ever existed, which may be important for <insert state actor/military here>.

[minitech]

That’s wasteful, inconvenient, and not even necessarily unrecoverable.