"So we get stupid movies because film makers are intelligent enough to realize the general public is stupid?
"I find it easier to believe that we get stupid movies because film makers are stupid, and the general public ever more stupid."
They are intelligent enough to make movies that will be bought by the majority of people and they enjoy lots of success in doing so. So long as they make money making films that cater to those people, you will still see those films. Sure, you as an individual can take issue with how movies are made and the prevalence of what you consider to be stupid in those movies, but to call those people stupid is illogical. It's silly to ascribe to the belief that the Fast and Furious movie series's success is due to mere coincidence, that they have no idea what they are doing, they are stupid, and that they just stumble into success and good box office performances everytime they make a movie. You'd have to illustrate how stupidity and a lack of common sense can go on to consistently churn out movies that do well.
If a movie had car chases and shooting in it yet went on to be a massive box office flop, cite it, because your position would be a lot more tenable then it is currently as all you are doing is asserting. Even if you did cite a movie that incorporated a lot of shooting and car stuff yet went on to fail, it still doesn't detract from the immense success the majority of movies experience have that do incorporate that stuff. Baby Driver is all about police chases, shooting, crime, driving stunts on public roadways, crashes, etc and it enjoys a 93% on rotten tomatoes and earned 226 million dollars against a 34 mil budget; pretty successful for a movie headed by stupid people and filled with car chases, shooting, crashes, etc.
For example, Fast and Furious 6 had some crazy things in it[www.bbc.com/news/blogs-magazine-monitor-23005848
] as did the last movie with the nuclear submarine. You always see those articles published exploring the realism behind these movies, whether it be the extremely long runway and the weird stunts performed by Vin Diesel in Fast and Furious 6 or the whole submarine thing in The Fate of the Furious[www.thewrap.com/fate-furious-can-submarine-really-outrun-car/
]; however, both went onto be extremely successful. Regardless of your personal disagreements and reservations about these movies, you are just going to have to accept that they have a winning formula and that they know how to use it.
As for the average movie-goer/the general public being stupid, you can certainly make a case for that depending on what's being discussed. In this instance, the desire to relax and watch a movie that offers an over-dramatic, less than realistic portrayal of driving, shooting, crime, and 'whatever' doesn't make people stupid. You are just being a critic.