You have broadened my thinking on this issue, but I'm not convinced that being "attached" to the result of an intervention is necessarily harmful (let alone something that makes me a dictator!). There are many ways to positively accommodate our natural emotional responses to things being other then we would passionately want them to be, into our continued efforts to make those things so. I agree with your comments on leadership (although I can think of some contrary examples), but leadership is just one area informed by expectation.
I think I am guilty of further polarizing what was presented as a false dichotomy in the first place. It is not the case that either we live a life full of expectations that poison us when they are not met; or that we must be devoid of expectation and experience all outcomes with equanimity. Shades of grey predominate.
That was really my beef with the article: its absolutism. Life requires a repertoire of attitudes and responses. It is futile and naive to say we must always adopt a principle of throwing all our expectations away. It is not so different from saying that the culture and technology we treasure could have been more painlessly attained in a world of wandering sadhus.