When you use Whatsapp, you're trusting a single entity to handle your messages (plus your ISP I guess). When you use RCS, your messages go through your mobile operator, google, and perhaps someone else in an overly complicated way that is also built upon SMS (a non-internet thing) for more confusion.
When you use Whatsapp, you're trusting a single entity to handle your messages (plus your ISP I guess). When you use RCS, your messages go through your mobile operator, google, and perhaps someone else in an overly complicated way that is also built upon SMS (a non-internet thing) for more confusion.