I honestly don't understand how this amendment is controversial at all. If you don't open your friggin' booth, then someone else will do it for you. It isn't an infringement on regional rights, it's just a convenience. Last time I checked there is no clause in the Constitution that protects regions' rights to f**ck up.
There are three things required for the Amendment to allow the opening of a regional voting booth.
(1) The President has to agree to allow for it.
(2) The SoFA has to agree to allow for it.
(3) Existing federal and/or regional law has to require the opening of a voting booth, and the region in question needs to have neglected this responsibility for no less than 72 hours.
It's not an issue of anyone taking rights away from anyone. It's an issue of the federal government giving the regions a helping hand in enforcing their laws when someone in said regions denies the voters their right to be heard as prescribed by federal or regional law.