RCS is controlled by Google just like iMessage.
Google doesnt control RCS. Its a general format. Apple could implement RCS. At most, they are a loud voice. Any phone can adopt it.
This is completely different from a closed imessage that cannot be adopted by others. Not to mention, imessage has been pretty anti-consumer with all their security problems, inability to accept high quality video, etc... None of this is good for the consumer.
What is good for the consumer is that the color of the bubble are different, this is important for status seeking individuals who want to be part of the in-group.
Back to the parent comments, RCS is better if you want a computing device. iMessage is the best if you want to buy your way into an in-group.
Oof gross. Do you have any further reading? I couldn't find anything on it.