Because every Islamic theocracy to date has been profoundly destabilising for its neighbours and the world, and always ends up imprisoning and immiserating its own people. No one wants more Irans or Afghanistans. (Or Saudi Arabias, though that's not said out loud as often.)
but neither Saudi Arabia nor Afghanistan's leaders were voted in ...
and secular/socialist/monarchic dictatorships have arguably worse effects on their neighbors and citizens - e.g. Saddam, Assad, Nasser, MBZ in UAE, MBS