That is, lets be generous, an interesting take. Fact is, VW engines had a mode recognizing a test and adopted AdBlue and fuel mixture to meet emission standard

That is, lets be generous, an interesting take. Fact is, VW engines had a mode recognizing a test and adopted AdBlue and fuel mixture to meet emission standards. On the road, these engines ran dirty. That was explicitely stated to be illegal in the applicable laws. It was all the other brands that played, as it turned out also illegal, games with temp windows and such. Blaming this on regulators is putting this while story on its head.