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HOA that are only responsible for maintenance of the subdivision sign all the way up to ones responsible for multiple skyrise condo buildingsThe latter is simply incorrect. Condo associations and co-op boards are separate creatures, in part due to there being an existential necessity to their existing. (You can't have people dismantling structural members their unit abuts.)
HOAs are far more voluntary in nature. That said, I agree that we need a better framework for distinguishing those functioning as direct democracies from those where an elected board gets to appoint itself powers.