They have given up even trying to make the plot make sense. It's just the vehicle to get you to the next shoot-out or car chase with the least possible amount of thinking. Indeed, if you think about it, you just end up asking yourself "why would anyone do that?" It's basically lazy. But I guess it's also an admission that they're only interested in a audience that's watching it for the gunfights and car chases. Except. The gunfight fans are up in arms about how stupid the opening scene is, where no-one shoots at the un-armoured helicopter, because it would've been easy to damage either the aircraft or it's occupants and that'd be the end of the ep. So... who knows.
