They would be if it wasn't easy to import them. It's not like modern mass production has made gun violence possible because up until then it was too hard to manufacture guns.
It's similar to services: you can your own email server, but it's much more efficient to use some vendor and let them do it for you. But if all vendors cut you off, it won't be impossible for you to host your down email, it'll just be less efficient.
It's similar to services: you can your own email server, but it's much more efficient to use some vendor and let them do it for you. But if all vendors cut you off, it won't be impossible for you to host your down email, it'll just be less efficient.