My wild guess regarding #1: Crypto is worthless if intelligence agencies of serious/powerful nations (guess: ~20 around the world), top blackhat groups or a sm

My wild guess regarding #1: Crypto is worthless if intelligence agencies of serious/powerful nations (guess: ~20 around the world), top blackhat groups or a small number of people working at the respective software companies are interested in your data. Stealing data from your box through a backdoor might be relatively simple and automated, but it's still an order of magnitude or two harder than just analyzing the plaintext sent to someone's server.