I think the blind copy/pasting of "disagree and commit" into every decision-related thread we're probably going to endure for some time will be annoying, and I

I think the blind copy/pasting of "disagree and commit" into every decision-related thread we're probably going to endure for some time will be annoying, and I don't think it is appropriate in this case, but I don't necessarily think it is a manipulation tactic in and of itself. There are lots of times where intelligent, informed, well-meaning people cannot come to an agreement on something important, and at some point, someone has to make a decision and everyone else should get on board with making it successful (this is hard - I've been in situations where a decision was made I didn't disagree with and it is against human nature to work hard on something you don't agree with - but the alternative is worse). There is a lot of subtlety in making that approach successful, though, which probably will get lost on a lot of people. If this is always unidirectional (from the manager) or is wielded too bluntly, then yes, it is manipulative and is really worse than just flatly saying "I'm the boss, do what I say". You'll note that even Bezos himself is on the other end of "disagree and commit", though.