Keep using SMS? What are Apple’s other alternatives, exactly? RCS is still a mess, the only way it has e2ee is if you use Google’s messaging app, and there’s no way you will see Apple adopting Google’s standard without having a say in it, and rightfully so - Google locks tons of proprietary features out of their APIs - EXIF data for Photos, Categories in Gmail, etc.
I think this is actually more of a comment on Google’s lack of direction with messaging - how many different messaging apps have they sunset by now? Half dozen or so? Messaging has always been a cluster on Android. WhatsApp is supposedly e2ee, but they have backdoor bugs being patched on a nearly basis - ask Jeff Bezos how his dick pics got hacked.