See my post 41. Even if it was interstate (rather than intrastate) commerce, it wouldn’t be constitutionally under federal jurisdiction.
You're exactly right, djsherin. As well, "regulated" within the 2nd Amendment meant a similiar thing - to keep operating smoothly (i.e. without obstructions and with maximum efficiency).
BUT, if you view the Commerce clause from within the administrative jurisdiction of the 14th Amendment, then the meaning of the word "regulate" means "administratively control through select limitations." And then if you take that concept and expand it as much as possible... you get the basis for almost all the Federal overreach we have today, where the Feds claim absolutely everything in utter reversal of Original Intent. Justice Thomas pointed that out (but I don't have the quote handy).