Or Google could have just licensed iMessage.
RCS is not a consumer benefit: RCS gives strange powers to the carrier that your phone connects to (as opposed to the company you contract with; i.e. your mobile carrier), powers over your camera, microphone, radio, power levels, and motion sensors. I don't care if T-Mobile can offer "true" 4G video calling with it with other T-mobile customers. Nobody fucking wants that.
Google deciding to partner with American Telcos and the American Government to get RCS standardized has confused you into thinking Apple did something wrong, or is continuing to do something wrong by not adopting Google's RCS (and paying Google's license fees for RCS, integrating with every carrier, and so on) instead of Google paying Apple for iMessage (and paying Apple's license fees for iMessage). This isn't your fault, you're just proof that Google's advertising is working and that Google is really good at advertising and marketing.
https://www.theverge.com/2019/10/25/20931699/android-messagi...
https://www.theverge.com/2022/8/9/23297951/google-apple-rcs-...