Earlier quoted context omitted.
It is about the features though. Apple users snob Android users because group messaging doesn’t work well, media features are not supported, etc. RCS offers such a rich environment that Apple could finally truly integrate most stuff transparently with iMessage. Send a video to the group chat? Everyone gets it at full quality. Make a poll? Everyone can vote.
You're both right. The features matter, but so does the social stigma of bubble color. Nothing will still have a feature and an edge by offering a "blue bubble" on Android, but this announcement would reduce my excitement a little bit if I were them.
The social stigma stems from iMessage giving Apple users advanced and integrated messaging for free since the very beginning, which “spoiled” people into not wanting to deal with pure SMS chats.