If the choice is between an architecture owned, patented and managed by a single company domiciled in a foreign country, versus one which is an international standard and has multiple competing vendors, the latter suddenly seems a lot more attractive.

Price and performance don't matter that much. Governments are a lot less price-sensitive than consumers (and even businesses), they're willing to spend money to achieve their goals.

(It's still a trade-off, because standards also cost community time and effort.)