With all the encryption I’ve used these past decades the only time I have entered a full encryption key was for cryptocurrency. Aren't 99% of use cases the case

With all the encryption I’ve used these past decades the only time I have entered a full encryption key was for cryptocurrency. Aren't 99% of use cases the case where the key is stored on the client device? It seems like the main deterrent then just comes down to the failure rate of the probes. On a tangent, a bad actor could then release HDCP keys for TVs from a big brand like Samsung and effectively invalidate all content protection for all the TVs they have already sold (afaik those can’t be remotely updated). If those keys are then revoked, there would be millions of bricked Samsung TVs.