This is all fine and dandy, but some of the most powerful militaries in the world are run by authoritarians who optimize for their own interests rather than what's good for their population. Russia's people generally gain nothing from Putin's belligerence, yet the belligerence happens. The CCP rolled the tanks on its own people; do you really think they'll hesitate to roll them on foreigners if it suits their interests?
I don't worry about the aggregate opinion of Russians or Chinese; I worry about Putin and the CCP.