Why is that? Hasn't the opposite (suburbia and car dependency) been forced upon you by government policy for the last 70 years? Yet, there's a substantial population that wants to completely destroy the suburban way of life via taxing it to death. Governments never intended to destroy city living. At least, not purposefully (perhaps via disinvestment).
You'd think you'd want the government to just create conditions for cheap energy since that's objectively good for everyone, and let people live how they want. If people choose suburbia, great. If they choose cities, great too. If the online movement is representative of a larger group, there are a lot off people who will still choose cities!