When you go through a border crossing or go to do something that might get you on the RADAR of a police or government entity, just wipe your phone or carry a burner.
They are looking to bypass pretty much any security you use at that point so for that threat profile and the security required to safeguard you, a password will not be sufficient and you are not going to win.
I'm not advocating for or against passwords here. I'm pointing out that A/. you can lockdown the device with key presses to make it require a password, some devices will require a password to be entered at certain intervals and when a device is restarted, and the only time you'd really need to worry about this is when dealing with law enforcement. At which point it's likely that your particular threat profile would require you to forego biometrics entirely.
But it's still not the same as no password. There's still a barrier, but you can be coerced to remove that barrier.
If you don't think they can force you to give up a pin or password, i would point you to the sheer number of incarcerated people who actually have been proven innocent who admitted to a crime because the police coerced a confession.