Point 2 is especially good:
Those of us who live in civilized democracies might be sort of OK with a setup where an official can get a warrant to open up a phone. Except for a huge proportion of Homo sapiens don’t; they’re in places where the government is some combination of corrupt, autocratic, and paranoid.
Is it sane to ask Apple, Google, and friends to make judgment calls on which governments get access to the “Golden Key”? I’m sure the governments they turn down will be just fine with that, and would never consider locking up local Apple employees to apply pressure.
Go ahead, encrypt your phone…