I never dreamt, in my dream, I'm Dalai Lama.
I felt we must separate political responsibility. The Dalai Lama should not carry that burden. So that is my selfish reason - to protect the old Dalai Lama tradition. It is safer without political involvement.
The Dalai Lama should not be partisan either, should remain above.
If the Dalai Lama joins one party, then that makes it hard for the system to work.