Right. Under this classification, my choice to make my own bread rather than buy it at the store, or my choice not to eat bread at all, is interstate commerce.
Based on your super-simplified classification, sure.
Based on the actual reasoning of the SCOTUS in Wickard, you would be quite wrong.
You could actually. Which is why I think it's really the wrong point to argue about. Almost everything we do is in some way involved with the market and has market effects.