Because the commenter you're replying to has no idea what brutalism is, and is confusing a ugly concrete block with holes in it with brutalism.
I've seen plenty of examples of Brutalism in architecture (in the UK) first hand and to most people it looks like ugly concrete blocks with hole in it.
I've seen plenty of examples of Brutalism in architecture (in the UK) first hand and to most people it looks like ugly concrete blocks with hole in it.