The claim works on two levels. On the surface, it offers social information: others have evaluated this and moved on. Underneath, it raises the cost of dissent — looking obstructive, slow, or out of touch.
Psychology has long studied conformity and social proof: people use others’ behavior as a cue for what’s correct or safe. That cue is useful in uncertain environments. It is also easy to manufacture.
Notice what is missing. Are names attached? Votes? Documents? Or is “everyone” a weather report — mood presented as fact?
An intelligent response does not require accusing anyone of manipulation. It requires separating the social claim from the substance of the decision.