How many times have you heard someone — probably a designer — say that something “looks cluttered”? How many times have you said it yourself? Well, I want to adjust the way you use that word so it is closer to the way “clutter” actually works in the mind of a user.
Any time somebody starts a sentence with “When the user…” you should say it again in your head, but change it to “If the user…” By assuming that users are going to do what you want, you put yourself in the wrong frame of mind.