Superblocks make it possible to separate high-speed and low-speed traffic: cars go in between superblocks while bikes go through them. This makes it way faster

Superblocks make it possible to separate high-speed and low-speed traffic: cars go in between superblocks while bikes go through them. This makes it way faster and safer to travel by bike, making it a viable method of commuting. Furthermore, the increased walkability reduces the number of bus stops needed and makes it way easier to construct bus lanes - which can get absolute priority at crossings. Walkable cities which are open to cars are a contradiction. Cars are absolutely massive and need a disproportionate amount of space. As long as you need to sacrifice half your neighborhood to cars, it is not going to become walkable.