This article reads more like an advertorial for Apple, than a serious analysis of the issue. Sure Google may be dreaming that Apple would ever do this, but there is a value to having a universal standards. People, around the world, still often have to fall back on SMS. Not everyone is on the same third party messaging platforms. It would be good if that standard could be updated.
And one of the big reasons, amongst several, that the universal standard is still SMS, from 1986, is because of Apple. If Apple embraced some form of RCS and came to the table with Google and the GSMA, maybe that fall back could be something a lot better than SMS, even if not up to the standards of Signal and other messaging apps.
Instead, Apple would rather use iMessage as a way to confuse their own users into thinking that iMessage "just works" and there something wrong with Android, because they really don't understand that what iMessage does is an entirely proprietary, backend Apple service, and has nothing to do with SMS. Honestly, almost no iPhone user I know understands this, they think the reason texts from Android phones look crappy on iMessage, is because something is wrong with Android phones, not because iMessage is mainly a closed system for iPhone users and purposely refuses to use RCS. At least with Signal and Whatsapp, etc., people understand that those are just separate messaging platforms.
I think a better startegy for Google would be to treat Apple to a dose of their own medicine. Make Google searches and Gmail and Google Maps worse on iPhones and Macs and have them appear is some odd color to denote that you're having a degraded experience because Apple products are not compatible with Google. Or show more and more obnoxious ads on iPhones and Macs, when using Google, Gmail, GMaps. Apple is essentially leveraging their closed ecosystem to make Android look bad, Google can play the same game.