you should watch jonathan meades documentaries if you are interested in architecture. there is an answer to this. brutalism was actually because the boomers needed things quickly so they through up houses, schools, universities, clinics, hospitals and offices for them. its hard to imagine now but their parents wanted them to have what they needed so much they were prepared to pay the price that you lament now. but like most truly disastrous things, it was done out of love, and a kind of painful one of that of people who'd survived a war and wanted better for their children (unthinkable today). those same boomers obviously now object to anyone building anything anywhere ever that spoils their views or risks reducing the rate of house price inflation to below 10% pa.
United Kingdom