Right.
So if they can’t project their power any further than local waters in East Asia, why should we care?
Well... big question.
1) Because China is rising. Every year it's military spending is rising.
2) Because China's influence isn't based on the military right now. It's based on economics.
BRICS just added Saudi Arabia, has Iran, that's two BIG oil producing countries along with Russia.
In 1999 Hugo Chavez got to power and wanted to strengthen OPEC to screw over the US. Iran, Iraq, Libya and Venezuela were the four countries who showed their opposition, look what happened, two have heavy sanctions, one had a US supported coup d'etat that ultimately failed after a week, one was invaded and the other bombed and the leader killed.
That's how important oil is for the US.
Venezuela is a big friend of China's, Iran and Russia too.
Russia is number two oil producer right now, Iran is 9th and Venezuela is down at 25th for some reason.
Get the Saudis on board, that's 3rd, get Iraq on board, that's 5th, China is 6th, get all of OPEC on board and suddenly the US has a LOT OF PROBLEMS, and that's China using its influence to get to the US.
3) If BRICS stops using the US dollar, that's going to be a HUGE shift in international politics. The US will be further weakened and China will be stronger.
4) If the US isn't a world power, it'll lose allies, it'll lose the ability to make so much money by fucking other countries over, like Iraq, it won't be able to invade who it likes and get away with it. It'll be the one being sanctioned because it opposes the world powers.