I don't know why the person who was first to respond to you is "dead" but set aside his value judgement; all he wrote is factually correct.
The embarrassment you speak of lies in the fact that it became public knowledge, not in the act itself, depending on the perspective of specific institutions.
Furthermore, disregarding the fact that signal is in Israeli hands, i'm fairly certain they don't even trust themselves and simply calculate and spread risks as they see fit.
Regarding your Munich example, the most significant factors for the outcome of that debacle where at one end incompetent people backed by powerless competent people and on the other end Microsoft with millions of lobby money backed by a powerful state actor. Both can easily be regarded as both a risk and opportunity for state security.
Your closing statement is of course indisputable, never the less we should not forget that despite the fact that times change; old adagia such as "Something you have, something you are, something you know" are not only easily understood by everyone but we are also getting there with for example the advent of cheap FIDO2 keys, fairly invisible network access control & encryption at device enrollment, infrared cameras, privacy respecting / agnostic AI driven real-time analytics & heuristics at scale and so on.
In other words, we are slowly getting there but not due things such as "having a BundesMessenger" unless it's weaknesses contribute to the drive for improvement ~ including replacing American cloud services ~ ; something it's open source nature definitely does.
> [The] Munich example, the most significant factors for the outcome of that debacle where at one end incompetent people backed by powerless competent people and on the other end Microsoft with millions of lobby money backed by a powerful state actor.
How is that different when it comes to Matrix/Elements vs proprietary apps? Maybe this time there's not so much lobbying and more "user just choosing a different communication channel" than they are told to use (as it's UX is so much worse).
