

Tibet was already an autonomous part of China under the Qing Dynasty, so I’m not sure what you mean by annexed. It still is an autonomous region, but what the current government did was to end the practice of enslavement and sacrifice of Tibetans and guarantee education and healthcare to all, rather than those being restricted to the priestly class.
Tibet was considered the last feudal system on earth. 98% of the population lived short, miserable lives. The priesthood was allowed to kidnap children and force them into service at any time. The punishment for crimes such as stealing food was severing hands and making them wear it around their neck. Literacy was near non-existent. Human rights were entirely non-existent. You clearly haven’t put much research into how the conditions were within the country, if you think anything I said above was exaggerated. The central government offered to maintain the priesthood as the seat of power, if they would end the practices of serfdom and allow education and land reform, among other things. The priesthood refused and organized militias to kill PLA soldiers who were teaching the people skills and providing food for the massively malnourished population.