No... RCS is a protocol (from GSMA) anyone can implement, Google just spearheaded it and developed Jibe to make it easy for operators to implement, but by doing this it means Google gained a lot of control of it and added their own features to such as end-to-end encryption.
Google is blocking RCS on rooted devices ( www.theverge.com )
Wtf is the reasoning here, just checked and it's broken for me also.