For exactly the same reason : space is scarce but power even more. Power can also become unavailable in a degraded situation much often than on land. Therefore, it is a better design choice to have a chest freezer.
In a city appartement where floor space is scarce, convenience is a key feature and power costs barely nothing, it is a less obvious choice.
In a city appartement where floor space is scarce, convenience is a key feature and power costs barely nothing, it is a less obvious choice.