How many times was the starship taken over by unfamiliar or less than stellar capable people? Reality makes for poor drama, especially when it can be wrapped up so nicely and neatly. That's not the point of telling the story. How much have people complained about forgotten of technology being forgotten throughout the years, or lack of security or whatnot? At some point in time it becomes a feature not a bug. Sorry, this asking more of Trek than I believe they will ever do. But, keep on fighting for it.