I think you may have misunderstood. Google's RCS was always envisioned to improve B2C business messaging, not it's sole purpose, but one of its uses. Right from their website "Credit card fraud alerts, flight status updates, and package delivery notifications are common examples of business-to-consumer SMS." Although it's interesting to note the large issue RCS had in India where businesses, including banks and lending firms, abused RCS and spammed users so badly Google had to turn it off. That's a good sign that Google is being responsible (and more likely following the law), but a bad sign that it might be abused, although any system can be abused. My main point was that Google isn't pushing RCS because of some concern over kids getting bullied over green bubbles, and vice versa Apple isn't agreeing to it for that either. Although it makes for great PR and you can bet both of them will somewhere along the line toot their own horns.
Honestly what causes kids to ostracize green bubbles ain't going to go away with changing bubble colors, which I highly doubt Apple would do anyway. Fixing group chats and videos/pictures finally being sent in a modern resolution will be a great step, but non-iMessage users will still be ostracized because they can't tap back, or don't have access to stickers, or typing indicators, or whatever iMessage feature possibly doesn't make it into RCS.