One use case that wasn't mentioned but is arguably the most important of all:

Keeping peoples' data protected from data hungry tools and processes, to protect people from penetrating queries that could leave them vulnerable and globally exposed.

The queriability of unencrypted data is just gonna keep increasing from here on out.

Cryptography is the only way to keep the digital world from collapsing in on itself. If there is to be any sense of locality, separation or closeness then cryptography is pivotal.

Cryptography wards off the "tower of babel" qualities of this new tech.