More conservative metros will at least build outward to deal with housing supply problems. Yeah, that's not really good for the environment, but it does help with prices. But not liberal cities: they don't want to build out OR up.
Instead, you get a plethora of excuses as to how they really shouldn't be expected to host any more human beings: why can't another city in the metro build more? Why can't those people move to another state? Why can't those companies hire more in another state? What about my god-given right to free, abundant car parking? Shouldn't we build more infrastructure before more housing (also let's not build that infrastructure please)? Why can't we freeze my neighborhood in amber? Etc.