> As a side note, I find it strange that you are for stronger data protection and at the same time think it is "silly" to avoid data collection companies such as WhatsApp.
For example, I would advocate to allow anonymous phones again. Since a few years you can only get a SIM card with identity verification in Germany.
I would also disallow third parties to create profiles of anybody, and I would ban the sale of such data. Currently as a company you can even make queries to the local "Einwohnermeldeamt" (registration office) and for a fee get address and other data of residents. I'm opposed to that, as well as the data collection going on at credit score agencies.
Personally I think what German officials are doing is often data protection theatre, akin to security theatre.
But I think WhatsApp is somewhat unavoidable, and after weighing the pros and cons I don't think it is reasonable to ban it (I know it is banned e.g. by many municipalities, schools, and trade unions for communication with citizens). It's better to allow it so you can reach people for whom this is the medium of choice, as long as you always provide a safer alternative of course.
If I could decide, I would also require every messenger and social network above say one million users to provide federation. Being able to access your own data the way you want is just as important an aspect of "data protection" as locking it down! And it would force competition and prevent one entitiy from being too big to avoid.