No, they do not. Once again, there is a difference between a specific command and a generic command. We are commanded to sing in worship. Using mechanical instruments of music adds to that command because it is a different type of music, and the other reasons I have shown.
We are also commanded to spread the Gospel to every nation. The medium we use, be it preaching in an assembly or publishing articles on the internet, does not add to or take away from the command.
This distinction of yours simply escapes me.