I also find these superblocks a bit oppressive, TBH. If they were one option among many I might find them appealing, but as the _only_ option they seem a bit...dystopian. Very much like the endless suburbs you find in American cities. Do we really need an absolute all-encompassing housing ideology?
But "You must live in one of 100 identical walk-up 4-storey courtyard-facing brown brick blocks, with a limited selection of approved local community businesses, and commute or drive for anything else" seems oppressive, yeah. Some people want to live in shiny glass high rises, or pay a premium to have a private yard, or live on a busy street full of bars and clubs. We don't need to define the One True Housing for Everyone and then implement it city-wide, we could just put a few of these superblocks within cities. But Barcelona looks just as oppressive to me as endless American suburbs, though admittedly it may be more pleasant to live there.
Take a look at Chicago from your mapping tool of choice. Slowly zoom out until the street names fall away and the minor roads start to disappear. The dominant feature is their 4x4 grid of major roads and it extends even to the close-in suburbs - especially in the north and south.
Perhaps you can call this the North American version of the superblock. Density is concentrated along these major roads (and the central business district, of course). The inner roads have that mix of single family homes, townhouses, high-rises, etc. depending on the neighborhood you are in.