Automatically add US store country-code to iTunes URLs missing it

It has been known for a long time that iTunes URLs without the country part can lead to all kinds of results. Like non-working links.
Yet adding them or changing valid URLs to ones without the country is still possible.
People do it for various reasons: some think it makes the link somehow global, others dislike certain languages and so on

It shouldn't be the burden of voters to explain this over and over again. A few examples:
https://musicbrainz.org/edit/65171209
https://musicbrainz.org/edit/65185802
https://musicbrainz.org/edit/66131729
https://musicbrainz.org/edit/67063350
https://musicbrainz.org/edit/66834666
https://musicbrainz.org/edit/67134304
https://musicbrainz.org/edit/66522401

I could provide many more such examples if I bothered to store all of them in my bookmarks.