".... No one will never put his people, soldiers, resources etc. into action For someone else"
Brother A,

, America mostly, but contributing Allies have been doing
exactly that ever since the summer '50.
But - that aside - I share your view of the outcome. There is so much going wrong right now in China, war-talk is for the 1.4 Billion.
But -
that aside lest-we-fortget, China's clear message to USA via Indian Ambassador as troops approached Yalu in 1950.
"Back Off .... Back Off"
The intel was discredited and the outcome is now history and legend ... on both sides.