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.
WhatsApp is great at marketing their e2ee, but nobody talks about the fact that so there have been so many backdoors out in the wild - they’re found annually. See: How Jeff Bezos’s photos were hacked.