This is the reason why Tibet lost their country. Ordained people, aka monks, do not know about politics and have no management skills in managing a country. They keep themselves secluded and isolated with no knowledge of what was happening in the world. They were so arrogant to think that they were on top of the world and there was nothing wrong to continue to practise feudalism.
When the English and the Chinese invaded, the Tibetans basically handed Tibet over to them. Neither did they have trained soldiers, nor weapons that are strong enough to defend Tibet. It was rather ridiculous to see monks in robes holding their guns. The robes and killing represented by the gun just don't match.
I am sure that the Dalai Lamas were the emanation of the Buddha of Compassion, Chenresig. I am sure he had the compassion and wisdom to rule Tibet. Unfortunately, within his group, there were more corrupted government officials, aristocrats and high-level monks.
There is nothing much a person can do. No matter how great he was, when he is surrounded by corrupted people, that's the result we see today. Om Mani Padme Hum!