Selling to a general public is not the same as selling to targeted clients. If you sell computers in a store, and an evil foreign dictator buys it from there, you are not as responsible as if that same foreign dictator approaches you and asks for a delivery.

Even selling to a general public is nuanced, as selling toothbrushes is not the same as selling automatic rifles. even though both can be used to kill people, one is optimized for keeping your teeth clean, while the other is optimized for causing injuries.