The use case

Large Corp. has stored all their encrypted financial documents in a cloud storage. In such a case, the confidentiality aspect is more important than the availability aspect.

Even if the cloud storage becomes unavailable due to service disruption for three consecutive days, it might not be as impactful as losing confidentiality.

Thus, their focus should be more on which strong encryption algorithm to use along with the key strength size to protect the data.

Similarly, for an organization in online trading business, the availability of ISP is most important to them; otherwise, if the internet is down, they won't be able to do online trading.