I'm not misunderstanding you, I simply disagree with you and your frame of analysis. Not everyone you speak to that disagrees is misunderstanding you, same with me.
You have a very idealist frame of analysis. Capitalism's persistence is not due to ideas, but material conditions. The compulsion for socialism isn't something won over because some people have socialist ideas, but because capitalism necessarily paves the way for socialism and creates its own demise.
Plus, the PRC is the largest economy in BRICS, and is a socialist country. Even if your frame of analysis requiring BRICS to have large socialist elements to supplant capitalism was correct, it's already correct, China eclipses every other economy in BRICS.