Earlier quoted context omitted.
Why not then allow motorcycles? They are just bikes upgraded with motors... Would make competition lot shorter too and interesting. Seeing them driving around without speed limits.
I'm guessing because they don't meet the criteria to participate, what's your point?
From a bit of reading, it sounds like there's a fairly widespread impression (or at least suspicion of) cheating. And that enforcement is quite weak, because the authorities care more about preventing public scandal than about preventing actual cheating.