Why did half the world decide SMS needed to be replaced with a proprietary app
SMS is even worse in terms of openness. You won’t find a modem that runs open source baseband firmware. It’s because the radios are subject to several regulations which means customers can’t be able to modify that firmware.
They usually cut costs in unnoticeable for regular consumer way. Like include some chemistry that easy to produce and makes it tasty, but bad for health.