"Mausoleum" is an excellent arrow to add to your rhetorical quiver. Instead of "[city] isn't a museum," say, "This will turn [city] into a mausoleum."
i remain partial to ed glaeser's approach to historical land marking: the city sets the total number of land mark-able parcels and if you want to add one you have to take away another.
otherwise, you get a ratchet and san francisco turns (even more) into a mausoleum.
The announcement is facing blowback from pro-housing factions who argue that landmarking thousands of new structures will undermine state and local laws that make it easier to build housing.