there is a difference from trying to stabilize an economy by controlling inflation and rates. We’ve seen China modifiy their currency maliciously. If China or Russia dont see favorable trade in their direction both would easily tank their economy to destroy other countries.
In 2019 China repeatedly modified their currency and rates causing world banks to believe they were doing it intentionally to gain trade advantage over orher countries.
In 2015 and 2005 they also devaluated their currency causing surges in trade and nearly caused a currency war.