These websites are not of a brutalist style. Habitat 67 and the like, while having a plain aesthetic, never did so at any expense of their user's ability to find their way around. These websites are relatively incomprehensible, and categorically closer to deconstructivist than brutalist.
A raised material design button is not ornate, it is plain and simple way to propose an action to a user.
A raised material design button is not ornate, it is plain and simple way to propose an action to a user.