Until people develop a workable alternative
The alternative will not appear out of thin air. More people need to have a sense of the long-reaching consequences of car-dependent urban planning and that’s what propels them to vote for better planning in their cities.
Nothing is going to change without a shift in political leanings, and that’s what this sort of advocacy is doing.
You mean mixing businesses and residential units in the same walkable neighborhood like we’ve done for thousands of years? That would never work! We must maximize commuting distances in order to reduce traffic and commuting times.