It looks better. Less clutter and mess. Utilitarian is a good term because a user interface ultimately is a utility. The type of interfaces you mention require

It looks better. Less clutter and mess. Utilitarian is a good term because a user interface ultimately is a utility. The type of interfaces you mention require no explanation to use, you don't have to think about how you do something, it is just obvious and typically being lightweight means less resource usage whether I am on cheap android-go or a fancy laptop that already has 500 tabs open. Look at Linux desktop interface themes and design vs windows and macos. I want software that empowers meand gets out of my way, so my UX preferences follow suit.