neither the bit nor the screw head can withstand the torque of a standard Torx or Hex fastener
Which "standard" Torx head? Maximum torque of 0.43Nm of a T5? Or maybe 10.5Nm of a T20? 132Nm of a T50? T60 is rated for 437Nm.
If you need a bolt that can handle 50Nm, you put a head that's sized to that on the bolt.If it's a Torx, you put a T40. If it's Hex, you put an 8mm on it. And if it's a stupid BMW one, you pick the size that can handle 50Nm. The shape doesn't matter.
Currently, a lot of the discarding is done by individual shops/resellers. I know of a few instances where basically all customer returns and unsold merchandise was slashed at the orders of the manufacturer to make them unusable, and then thrown in the bin.
If that is made illegal and everything would have to be returned, stored, processed and then sent somewhere else anyway, the chance that it's going to end up with destruction greatly diminishes - opening that outlet section/shop or selling them to a local outlet company suddenly makes a lot more finacial sense.