Messing with text files in this kind of configurations is stupid in my opinion.
I would love if there would be proper security and limitations for apps. I also want to be in charge of what permissions each app can get in my phone. It is nice if system could ask once if I want to grant Mitäkuuluu an access to contacts but it is not ok when system denies the access without asking anything and it is not ok if no harbour application can get such permissions.