Why AS doesnt war directly with Russia and China?

[Juanas Orta]

They always use proxy (Venezuela, iran, Greenland,, etc) , if don't brave, let them live in peace and quiet.

[PostQuantumBTC]

US know that it can be catastrophic for them, so they will avoid these countries. United States only have influence than these countries as they are allies to more countries, UK and EU are the key friends that gave the United States the world power. China and Russia have world power also as they follow United States. If there is war between them, United States will suffer.

Why did you think United States is not yet ready to attack Iran? Because the country is far stronger than Venezuela, equipped with dangerous military weapons that can destroy many US base that is close to Iran.

[WillyAp]

US know that it can be catastrophic for them, so they will avoid these countries.

In Venezuela the US entered without any proxy, in Iran the US bombed with US Bombers. Vietnam: the US actively participated.
All these conspiracy and deeper reasoning have very little connection to reality. I guess it is born from consuming to many movies.