When Medicine Fails.....
The Exorcist's enormous success reflected its mix of bestseller source(ala The Godfather), gotta-see-it horror reputation(ala Psycho) and something else: director William Friedkin's desire to at once make a cynical study of modern medicine AND to speak to religious beliefs and values. (As critic Pauline Kael wrote in her angry pan of the film in 1973, "It's the biggest booster for the Catholic church since Bing Crosby in Going My Way.")
The rather unlikeable creative team who made The Exorcist(abusive William Friedkin and fatuous William Peter Blatty) both noted that evidently for 1973 audiences, the biggest horrors in The Exorcist weren't in the scenes with the monster in the bedroom -- they were the medical scenes, principally the surgical procedure (filmed in bright, flat, realistic light) in which the big long needle was inserted into sweet little Linda Blair's neck. THAT was the scene, said the makers, that caused fainting and vomiting in the audience.
As well it might. Because people don't much like going to the doctor, or going to the hospital , or getting a shot, or being physically invaded.
And The Exorcist subjected Regan (and her long-suffering mother) to ALL of that and then made the scariest announcement of all: sometimes medicine fails. Sometimes, the cure can't be found. Sometimes, the "medical experts" have no idea WHY a person is sick.
I've seen this with friends and family. Doctors and surgeons are OK with setting broken arms, removing appendixes and gall bladders, and even the life endangering but safe matters of heart surgery.
But what doctors are NOT OK with is being unable to really TELL a patient what is wrong with them when the disease is "unknown"...and EXACTLY how it can be treated or cured. I've known person after person who is frustrated and sad when doctors tell them "we don't really know what this is, or how we can treat it." Usually, a medication is used that is used to treat some other disease. "Fingers crossed."
The Exorcist offers rather a "fantasy" solution to the age-old problem "when medicine fails": Faith healing. That's controversial, right there. If you don't believe in faith, or religion or God...the "solution" to saving Regan(an exorcism) falls flat. (Jane Fonda evidently turned down the Mother role saying "she didn't believe in fairy tales.") If you DO believe in faith, indeed, here is the movie that tells you that it can overcome and solve the problems that no doctor can handle.
Which is another reason this movie was a big, big hit. Foul-mouthed, gross and gory -- but deeply of faith.
The question remains: just how much did the filmmakers BELIEVE in this faith?
PS. In today's era of comic book films, faith-based solutions to everything come up in the final act...but it is faith in superpowers and the icons that create them, not in religious faith.