Quick data point that Samsung Android phones (at least the ones I've used for the last many years) unlock with fingerprint on the side which is as close to a zero-effort unlock as you can get.
I have Face ID enabled etc, but it doesn’t change the fact that it’s annoying. If I’m alone at home with the door locked, there is an infinitesimally small chance of any security issue that would render my device compromised. So realistically, I’m accounting for my own sanity + convenience here.
