@vvf69107 I am surprised people don't understand what you are getting at.
If you are about to get arrested, you may have time to put your hand in a pocket and hold down a button for 5 seconds and slowly remove your hand. That's not a lot of motion and may not get you hurt. Also you may notice something prior to an arrest: you might hear noises that are unusual or see something that makes you think there could be a possible arrest. You can't take out a phone and start pressing buttons and that point to initiate a process. It could also make an arrest more likely to do that if you aren't sure what's going on and make it harder to deny you didn't just do something that might be illegal in some countries. You might have time to hold down a button for 3 seconds.
Having a 10 minute auto-reboot option is not practical for normal use and a long password. Any sort of good password is going to be long and a pain in the ass to type in each time. Most users may want the Owner profile to have a difficult password and other profiles that are less important to have an easier password for easy usage. A 10 minute auto-reboot will force you to keep logging into owner with a harder password again and again. A 10 minute auto reboot also relies on anyone doing an arrest not having an exploit for that situation and they might have an exploit for that and just don't tell people. An adversary may claim that an arrested person has an easy to guess a password like "fuckoff" and the suspect was not very good at making passwords when the password was really 10000 characters and the adversary doesn't want to give a way their exploit. People in law enforcement do lie at times including to the public. Arrested people with long sentences do not have a way of blogging about how they had great OPSEC and their adversary is lying about how they bypassed that and their password was never "fuck off" nor do they likely care at that point to warn others. For people with a high threat model using Profile 2 that resets every 8 hours of inactivity, they want to be able to shut down the phone faster than 30 seconds.
5 seconds is much too long. It should be 2 seconds. 30 is very bad.
It's sketchy that people don't grasp your initial concern.