Because this is believable based on recent years filled with all kinds of quality issues, from counterfeit products shipped side-by-side with genuine ones up to

Because this is believable based on recent years filled with all kinds of quality issues, from counterfeit products shipped side-by-side with genuine ones up to Amazon doing absolutely nothing against various shameless review tricks (for example I haven't even found a way to report such cases anywhere, so to me they're clearly not even interested in doing anything - EDIT: what is visible is a button for me as a private, logged in customer where I can setup a seller account right between product description and automated suggestions...no report button though). May this be fake? Sure. It's just not very likely based on history.