I'm not going to argue against the benefits of choreographing user interface elements, as I deeply believe in it. However, it saddens me (quite a lot) to see al

I'm not going to argue against the benefits of choreographing user interface elements, as I deeply believe in it. However, it saddens me (quite a lot) to see all UX articles saying and assuming "this is best for the user", "the user thinks/works this way", "this will clarify", without ever presenting the minimum piece of evidence to support such claims. Isn't/shouldn't UX be truly user centered and user focused? If so, why do we insist on centering everything around our preconceptions and common sense ideas, instead of actually grounding it on data collected from and with real users?