How about Japan, South Korea, US, India...even Russia maybe if Putin falls? China won't have many trading partners left if it adopts your plan. Meanwhile, all those countries are merrily funding the growing capabilities of the PLA.
The difference is those countries run a trade deficit with China meaning China makes more from them than the other way around in trade. As long as that holds, no reason to shoot yourself in the foot as China is getting more $$$ out of every trade.
Australia runs a trade surplus with China, meaning it is making more money off of China than the other way around, now it’s not as simple as that because obviously a lot of the raw materials out of Australia get turned into final products sold else where by China, but reducing luxury spends like lobsters and wine from Australia is a net positive for China and therefore Australia should be the one begging for it, not China.