The non-technical narrative is very simple: Google, Apple, or the German government can revoke your ID at any time. You cannot purchase or sell anything[1], sign any contracts, have a job, rent an apartment, use public transportation, or receive any kind of government services without an ID. This should sound
extremely alarming to everyone regardless of technical knowledge.
[1] Maybe with cash, for now, but cash is clearly not long for this world, and your bank account will be inaccessible already.