Until the "best smartphone security" is two passwords: The second you enter when under duress, and it populates your phone with pro government content based on your current location. Or just wipes your phone. Or permanently locks, encrypts, and sends decryption key to some trusted source.
And then we beat you up for deliberately sabotaging our investigation. If you didn't have anything to hide why would you wipe your phone? Clearly you must be a spy or worse so we have no choice but to send you to the re-education camp.
The Xiaomi phones have this. You can create a "Second Space" with a different PIN (or using a different fingerprint to unlock it) from the first. When you use the second PIN it unlocks a completely separate environment which is not aware of the other one.
Sure, unless they actually want the information. So you'd' have to choose which outcome would be better for you and / or your cause. But that's the point, at least you'd still get to choose. For the sake of argument, imagine the dual password is a bit more intelligent about what it displays and hides based on what you've entered.
