If you think the parent is incorrect, I invite everyone to look up Gonzales v. Raich, and Wickard v. Filburn. Everything is commerce, and therefore regulated under Congress via the commerce clause.
I don't think it's incorrect, which is why I brought up the commerce clause in the first place (with Filburn in mind). I agree, to congress everything is commerce. It's just such a farce that it would strain credulity if it wasn't so clearly evidenced. We truly live in a mockery of a rational world.