I dont think this confirms that WhatsApp can ready our messages. In theory it could be implemented as a simple message forward, just as any message can be forwarded in Whatsapp.
After reading this, I think Signal is also violating this policy. I was not able to find a way to report messages or users. In comparison on WhatsApp I can report a user or group and the "most recent messages" will be forwarded to moderation.
I think it is kind of strange that even a private messenger needs to implement a report system for messages.
The current law is not yet big in the media. I am not sure if there will be a big discussion. If public media decides to push this topic, there will be resistance. I doubt that the average German will notice that this law was passed, if there is a lack of big media covering this topic.
LOL, thanks for the laugh! :-)