Tere
you also describe a part of my thoughts. i know that my father has 2 main reasons for my chastity. on the one hand he doesn't want to give up control because he's afraid to lose me. through the chastity equipment he can determine a part of my life and thus ensure that a certain bond is formed. on the other hand he wants to protect me, which for me is the only positive part of the whole. he wants to protect me from boys/girls who only want sex and from unwanted pregnancies. he wants me to find the right partner before I can get out of this protection.
regarding the trust between wearer and key holder, i trust my father 100%, he pays attention to all aspects of my chastity and makes sure that it becomes strict but not dangerous. in case of emergency he would let me out immediately, but an emergency is just a situation for him that endangers my health or my life.
asking my father to unlock me wouldn't help, he wouldn't get involved with that. i asked him a few times, but he only said if he unlocked me i should pack my things, take off my clothes and not let me see anymore. that sounds hard and it hurts to hear something like that but i also see how important the whole thing is for him