Then you're trading one proprietary system for another. Fallback systems need to be open standards and not managed by one corporation. Right now that is the technical equivalent of saying Apple should have integrated Google Hangouts into iMessage. There needs to be a push from the FCC to sunset SMS.

RCS in its most widespread form is handled through Google’s servers. RCS as we need it isn’t happening because carriers are ass. If they replaced SMS with RCS, Apple would have no choice but to use it for fallback.