Cwa-app-ios: Make Low Risk Exposure display optional

[my-tien]

Avoid duplicates

• [x] This issue has not already been raised before

• [x] If you are proposing a new feature, please do so in CWA-Wishlist

• I have carefully read https://github.com/corona-warn-app/cwa-backlog/issues/23

• I am aware of the work in progress to add a better explanation to the app.
• I am aware of the current stance of the RKI, cited in the above issue.

Current Implementation

The app shows low risk exposures and suggests the same behavior as in the case of no low risk exposures.

Suggested Enhancement

Hide low risk exposures per default as these can unnerve insecure people to a degree that leads them to uninstall the app. But add an option to turn it on.

Reasoning

I live with a woman in her 60s who received a low risk exposure notification. She was extremely upset by this and checked the app every day since then, hoping that the notification had vanished.
She consulted with me, both of her sons and several friends about this and also read up on it herself.

• Three of the people spoken to gave her extensive explanations about the meaning and implications of the notification.
• I read to her the new explanation that is going to be added to the app.
• In her internet research she read the CWA FAQ and other sources that explained the status accurately.
• One person said that she didn’t know what the notification meant but that her husband had it too and ignored it.
• One person mistook her inquiry as a search for the infected person and asserted that she was “clean”.
• Two people told her that the app is stupid and that she should uninstall it.

After all this she was still insecure. She did not understand why a low risk notification is shown when no precautions need to be taken.
Saying that its purpose is transparency, so that people can decide for themselves if they want to be extra careful, did not help. _She simply didn’t know how she should decide to be extra careful or not._
When she first brought up the idea of uninstalling the app because it made her anxious, I was able to talk her out of it. But several days later the notification was still there, creeping her out. She made the final decision to uninstall.

Her problem is clearly not a lack of information on the status, rather too much information combined with too much own responsibility and too little confidence on the topic.

Here’s another less anecdotal argument:

Although transparency is a good thing if I can make informed decisions based on it, it is not useful in and of itself. Since time, duration and location of the exposure are not shared due to data protection, _there is no information to base a decision on_. Hence, the transparency serves no purpose.
If there _are_ reasonable decisions one could make based on the notification alone, such as _Refrain from meeting old people_ or _Don’t go to work_, they’d be the same for all low risk exposed people and could therefore be added to the behavior guidlines in the app.
Apparently this isn’t the case, so I don’t see the purpose of displaying the exposure at all.

Expected Benefits

Keeping insecure people from uninstalling the app while satisfying the transparency wishes of other people at the same time.

[my-tien]

Opened in correct repo: https://github.com/corona-warn-app/cwa-wishlist/issues/181