Going back to China is definitely a better option for the Tibetans. There is so much opportunity in China, Tibetans can work in the government sector or private sector, they have the choice. They don't have to be someone's relative to get a job in the government sector. However, they must have the qualification to do the job.
Unlike in India, to get a job in the CTA, you must have a connection in the CTA, qualification is not necessary. This is the reason why the Tibetan community in India is not progressing. Free Tibet movement does not give any result, Tibetans are still refugees in India. No one knows for sure if the Tibet cause will ever succeed.
After waiting for so long, many Tibetans have given up on the CTA. They want to move on with their lives. Migrating overseas, becoming the Indian citizen or going back to China are their options. Looking at how China is getting stronger every day, it makes a lot of sense to go back to China for a better future and a better life.