Designer right now value aesthetics over usability. If your design starts out from the question "how do we make this more user friendly", you will arrive at a totally different answer than when you ask "how do we make this look like everything else, but also stand out".

Aesthetics are essentially worthless for a user interface and should always be a secondary concern. But clearly designers have elevated aesthetics over usability, hence the numerous and constant redesigns of everything.

If you care about usability you know that a redesign necessarily comes at a great cost, since you are breaking many of the mental connections of your users. It is only justifiable if there is some serious gain by doing that.