The core components of information security are often misunderstood. The triad of confidentiality, integrity and availability are important to consider. There is a symbiosis between these three components. For example, if confidentiality and availability is highly restrictive, can we really be confident in the integrity of the data with so few people who have such limited access?
The old adage, being so tragically expressed here in real world terms, that the only "secure" computer is locked in a vault at the bottom of an ocean belies the very nature of security. For data to be useful and meaningful, it must be accessible to the people who need it when they need it. Failure to properly deliver accessibility will consequently build pressure on confidentiality (e.g. it will be shared inappropriately) and/or data integrity (e.g. the data will grow stale/irrelevant/etc).
A typewriter is a medieval instrument for data security. Because they have rockets, they might as well start building castle walls. They are, in essence and by design, surrendering. Sun Tzu would be proud of such an adversary that could create this result. Masterful.