In the same way as this was a mistakes for building (beauty matter) it is too for website.
We human respond to more than the "content" or raw function of things. We have an emotional connection with everything.
The visual cues, the color, the composition all affect how you are perceive and use a product or house.
The brutalist look shout to other this place is about business/information, I despise beauty and think it’s a waste of time.