The fact is no one really wants Tibet to be independent, everyone has their own agenda. If Lobsang Sangay and his cronies love Tibet so much, why are they not refugees like their fellow Tibetans in India? Why all of them have a passport from another country? Since they have decided to be the citizen of another country, it means they are not interested in going back to Tibet.
Lobsang Sangay and the CTA are using the Tibetans to make money, to get free money from the West. They have been earning their living like this, it's hard for them to give up such an easy way to make money. Therefore, they will not make free Tibet a success. They will only talk but they will never take action.
For the western countries, they also want the Tibetans and Tibet to remain status quo because this is the card for them to irk China and to sabotage China. Without the Tibet cause, there will be one less topic for them to condemn China. The western countries are not so stupid to keep giving money to support a cause that has been going on for the past 60 years and shows no results. All of them have their own agenda. The ones who suffer are the Tibetans.
I agree with you, no one really wants to free Tibet. Tibet issue is a very useful tool for different people with different agendas. For Lobsang Sangay, the Tibet issue is his income generator. Without the Tibet issue, where is he going to get the fund to pay for his and his cronies' salary? He is not that stupid to make himself jobless by making Free Tibet movement successful. He likes power, he won't want to be reporting to China.
As for the western countries, they are finding ways to sabotage China as the growing power of China is a threat to them. They want to be in control of the world economy so they can do what they want. If China becomes the strongest economy, they will lose control and they have to listen to China. For centuries, the western countries have been the big brother, they will not like to lose that status. Unfortunately, who has the money, who will be the boss.
For those who claim they are human right activists, many of them are actually paid to do the job, they are not that righteous. They are hired to create problems for China, for example, Robert Thurman. Again, this group of people doesn't want the Tibet cause to be successful. If the Tibet cause is a success, they will lose their income. At the end of the day, it is all about the money.