> Houses directly next to a corner shop I guess are worth a bit less than the same house a block away

This could be true but I would want to see some data. I have paid extra for an apartment before because it it had a grocery store on the first floor, so it's not obvious to me that being adjacent and having to walk past the shop every day would drive a home price down. I know apartments and detached homes are different, but still.

I just think the common explanation for NIMBYism, that everyone wants to protect their property value, doesn't actually make sense when it seems like the densest American cities are also the most expensive to live in. I have the same confusion about public transit. It's common for suburbs to fight very hard to keep public transit out of their town, but it's incredibly expensive to live within walking distance of a train station, so property values don't work as an explanation for this either. You also hear people say it's because the NIMBYs are afraid of the city folk invading their suburban paradise, but if you go to NYC or DC nobody is taking the train from the city to the suburbs to have fun, there's nothing to do there. These stops are almost exclusively used by upper middle class office workers going into the city for work. You don't have to worry about poor city people because as soon as the stop is built, they won't be able to afford a house anywhere near it.