Precisely, imagine what the ongoing or brewing conflicts would be like if China had top tier chip manufacturing capabilities and no need for international trade

Precisely, imagine what the ongoing or brewing conflicts would be like if China had top tier chip manufacturing capabilities and no need for international trade and if Russia had diversified exports, a healthy autonomous industry, chip manufacturing capability, etc. International economic ties do help to prevent war even if their ability to do so is limmited. They also serve as a warning for when a state desires to go to war because you will see the state trying to limmit ties in order to limmit the effect of sanctions.