Honestly, that's not something you can expect from regular non-power users. Full-disk encryption isn't enabled by default on most consumer laptops, and few regular users go out of their way to set it up.
When I travel out of the country, I reset my phone and Chromebook to their factory defaults and then provision a decoy account. Once I'm across the border, I provision my primary account.
Even if they image my devices, all they'll get is old encrypted garbage for which the key is unavailable because the key was rendered inaccessible when the device was reset to factory defaults.
But many people don't use a strong password/phrase.