Earlier quoted context omitted.
A charming bakery in a now expensive part of town is in fact an economic inefficiency. You can argue against it on non-economic grounds, but living in a luxury apartment is a good that people consume, just like madeleines.
Charming bakery with five stories of apartments above it > charming bakery by itself
We see so much about wanting "walkable" neighborhoods where we have shops and markets all steps away from our door. Well, if the land is so valuable that it will only support dense apartment towers, small businesses like that will not be able to afford to be close by.