You have to understand and accept that the people making and promoting films are absolutely convinced that you are too dumb to notice things like this.
No, they know that the costs of doing things right outweigh the benefit of placating the few. Modern directors using firearms in a movie have firearm experts at their side. If having a five minute scene where Johnny Hammer field strips his glock would make money, it would be in the movie.
The aim of a film is to make money, and reality always gives way to the plot and audience expectations. This is true for every technical field, not just the use of firearms.