LOL! What a hoot.
The red car question is not a stupid question at all. If I may give another example, what if congress passed a law saying that it was illegal to eat hamburgers (maybe with some long term health story as an excuse)? Is that then the law of the land that everyone must obey? Of course not!! It is not within their power to control what you eat. Even if they had valid scientific evidence that it was harmful, they could legally only publish that information and give suggestions. They could not make it a criminal act.
Of course, I bet that our current congress thinks that they do have that authority but are afraid of the consequences of that particular action. Nevertheless they do not have the authority (see tenth amendment) and the law could be challenged in court. If the supremos nevertheless said that it was valid, we still would have another line of defense, the jury system.
Every juror, on every jury that must decide a hamburger possession case could simply refuse to convict and end the nonsense. Of course our public schooled jurors are unaware of this and believe the lies told to them by the whole legal system. If they knew this, the drug war would have been over decades ago.