*follow-ups trimmed*

"John Savard" wrote ...
If China were weak and helpless, Tibet would have been liberated long
ago. Therefore, for China not to be weak and helpless is bad, because
China's not being weak and helpless is contributing to innocent people
getting hurt.

Where is the flaw in that logic?

About four lines up from your question. If China was weak and helpless
(relative to current state anyway) it does not follow that Tibet would have
been liberated.

Whether relatively weak countries, regardless of their mistreatment of those
within their (current) borders are interferred with is dependent on the whims
of the external governments involved and the politics of the moment.

Balkans style informal civil war and ethinic cleansing would be a distinct
possibility, and not necessarilly an improvement from Tibet's point of view.