Can I ask where you are getting your facts/information?
So many sources.
Which facts do you dispute? Do you really believe that a 120V relay without battery backup would be used to monitor a fire sensor? I mean, most of this is common sense when you get into it. Other rules are designed so that the average homeowner can maintain their system. While you think replacing a 12V lead acid battery in a panel isn't hard, just insuring that people replace the 9v battery in smoke alarms is a challenge. Still other rules were designed to minimize false alarms and needless expenses to the city. When you view it from many points-of-view, most of the rules really do make sense.