I wish UX/UI designers would use statistics or tests to validate their argument. The fact that someone else does it (e.g. Google, Facebook) or it seems analogo

I wish UX/UI designers would use statistics or tests to validate their argument. The fact that someone else does it (e.g. Google, Facebook) or it seems analogous to real-life experiences is just one part of the discussion. The other part is if users actually enjoy that particular decision and end up doing a desired outcome at a higher rate than with historic iterations.