

Adults choose to live there by their own will, no one is forcing them to.
The only party force people against their will is CCP forcing young and adult monks leave temples, and force children to live in Han-speaking schools full time without their parents.
Khamenei is weak. Maybe he wasn’t in the beginning, but he has been for the past decade or so. Killing him is risky for US and Israel as that may potentially give Iran another stronger leader. Russia doesn’t want change either as Khamenei is known and manageable.