(yeah, this works both ways)
I do have a state in my postal address, and if I have to enter my address as 47374 Richmond instead of Richmond IN 47374, it will probably go to Virginia first, and maybe they'll get it to me eventually.
Just saying. Internationalism is hard. If you want to go for the global market, it would behoove you to try to do it right.
you should remove the State field if the country isn't set to U.S.A. or at least make it optional
He doesn't say "Remove state completely".
That way you can enter your address any way you see fit. You really know best how to address mail so that it gets to you, why would I want to pretend I know better?
If you're doing business across state/province or national borders, getting that structured address data (and getting it right) can be awfully important.