If you know much of anything about Any Particular Subject, you will notice that the movies almost always get it wrong
Yep pretty much. For example most musicians cringe whenever they see people "playing" musical instruments on screen. Also, most "conductors" on screen are pretty laughable too.
I think the problem is that to get things completely authentic you need a technical advisor at every single step of the production process. It may not add much to the cost of a movie to have a couple more consultants, but it costs a lot of money having a know-it-all step in to correct things every step of the way. This could really slow down a very tight schedule. And when costs are in the thousands of dollars an hour range, details necessarily get overlooked.
Whenever I go to see a movie I try to turn off my inner Cliff Clavin and just let my suspension of disbelief take over.