The regulation crucially results in your recruits not dying for no good reason during training just because some random piece of trash equipment predictably failed.

Preventing that is much more important than the exact dollar efficiency of said equipment during peacetime.

Perhaps, but, for better or worse, it's about optics. It looks better to say a soldier died bravely in war than it does to say they died because of a friendly-fire incident with a drone with shoddy control software.