It actually costs us money not having it. Many things have to be special made for america compared with the rest of the word. In addition there have been costly mistakes because of the confusing between the systems, like what happened with the mars climate orbiter,
Omg, THIS is an argument for presidency?? It would cost billions, block roads, and waste time and materials to do this. Not to mention he already dropped out...
No, seriously good luck with that.