Yes it does, and the German state governments have made very questionable decisions here. I'm arguing against the misguided notion that this is being dismissed

Yes it does, and the German state governments have made very questionable decisions here. I'm arguing against the misguided notion that this is being dismissed as conspiracy theory, which it absolutely is not. Luca has been controversial since the beginning. The reason why a centralised solution was chosen is quite simple to see, though: In the centralised system, the health agency knows who to contact when they might have been infected and could in theory force these people to do a test or into quarantine (in practice, they usually don't have enough personnel to do so, though...). With the decentralised system, every person can get a notification when they could have been exposed. Whether or not they act upon that notification is up to them. In the end, I don't think the privacy nightmare is worth it (especially given that health departments are understaffed), but I can see how other actors could come to a different conclusion without it having to be a conscious decision to collect a ton of data for other purposes.