Brutalist doesn't meen no css. Brutalism in architecture is minimum decoration. I mean, it would be brutalist to leave tubes and other plumbings visible on the outside, but if you hide them to make the spacer "prettier" it's still brutalism.
Yes, my understanding of brutalism is that it was meant to be about "honesty" rather than "ugliness" -- little decoration, craftmanship, or anything for the quality of the materials themselves to hide behind. But some of its most famous exponents appear to be more about "ugliness", so over time it's kind of come to mean "ugliness in the name of honesty", which really is hard to appreciate.
I immediately "got" brutalism in architecture when I saw those all-concrete no-windows structures. But you look at wikipedia and I think the ones with windows or color should have another, lesser name.
When I think of brutalism, I think of the Barbican Estate in London as a canonical example - there's a lot of concrete, but also a lot of windows (a whole lot more window area than you would find in other UK residential architecture).
And, it feels absolutely comfortable to be inside.
I value the experience of being inside the building, more than how it looks from the outside. As such, I find it hard to understand when people associate brutalism with ugliness.
