The Swiss law punishes one for being an unintentional accessory to crime. One’s negligence could place an additional burden on law enforcement, unnecessarily.

The German law similarly punishes negligence – running out of fuel could result in one’s vehicle becoming a hazard (a greater one than it already is).

The Danish law was almost certainly drafted in the context of people servicing cars. I can imagine there have been “accidents” where cars were started with mechanics still underneath.

Of course, the real absurdity is that private motorised vehicles are still legal.
They were not contested when they first appeared as luxury items for the wealthy, despite their hazards, because of the influence these individuals had.

So the only really absurd driving law is in fact the one that doesn’t exist.