Wickard v Filburn has got to be one of the worst precedents ever. I sincerely hope the SC reverses it next.
By the same logic, I can never collect my own rain water as it would impact interstate commerce.
Similarly, I could never have a free school play for parents, because I would be taking money away from local theaters, and that would eventually resonate to interstate commerce.
The Constitution's interstate commerce clause has been purposely misinterpreted to mean regulation of commerce within a state if you can abstract nth order effects to another state. In actuality, all it is supposed to to is allow the regulation of commerce across state lines, meaning regulation on the transport of materials from one state to another.