> Old oil is processed and re-used (as cheaper oil, or for heating)

Or illegally dumped if we follow OPs cynical reasoning.

> it's usually one of the electronic parts

I didn't know tubes, gaskets, seals, clutches, oil filters, spark plugs, fuel pumps, radiators, alternators were electronic parts.

I am not claiming EVs are perfect but to propose classical ICE vehicles are somehow much better simply does not make any sense. To exist as a modern human is to have an impact on your environment.