AAS_1981 it will only ask password for switching off and not for restarting the phone. because if someone rob your phone and if he switch off the phone it can’t be traced by phone or IMEI number (if the SIM card is removed ,at last it can also be traced by IMEI number).
So to prevent the person who have stolen your phone from Switching it off ,this feature will help where the person can’t turn it off.
As of screen unresponsive/freezing at lockscreen,there is no worry.becouse the system will not ask password for manual restarting or 3 button force restarting, because it’s simple, if someone switch off’s the phone there is no way to track the phone {so…password to switch off the phone will help} regarding of restarting the phone it will not ask the password because the phone off’s for some seconds and switch on’s by which the phone can be traced,it can be traced by all the available connection. If the phone only shutdowns how can it be traced….it’s simple