The problem with that is that the "rich enough to have no real problems" people know that for every upscale coffee shop they like there will be five people doing heavier economic activity that they don't like and because they're the only ones with the free time to care they drive the conversation and they limit it to light consumer businesses which of course can't work because that hypothetical coffee shop or sandwich shop needs the foot traffic from all the other business (that doesn't exist, because it's not allowed) in order to actually turn a profit without insane prices. And so then nothing actually gets developed in the up-zoned area and it's still a glorified bedroom community.
The people who could actually provide the political will for a proper removal or liberalization of the zoning don't get involved, because they all have other shit going on that's more important.