Why should they? I honestly think they would have been justified giving RCS the middle finger indefinitely. It's effectively google-owned and a shitty protocol (no e2e by default being top of mind).

Also, the idea of wanting the carriers more involved in messaging is hilarious, just use one of the 10+ 100x better messaging platforms. The carries horribly bungled SMS/MMS and they ceded all control of RCS to google, why in the world would anyone want them involved. They barely can do their jobs as dumb pipes.