There's a reason the film industry doesn't measure the success of modern movies against those of the past — movie ticket inflation isn't an exact science. There are so many factors behind what makes a movie a box office success and those factors have changed since the earliest days of cinema.
For one, consumers have many more choices of what to spend their money on when it comes to entertainment. Even if you exclude sporting events, concerts and at-home entertainment such as streaming services and video games, just the sheer number of options of what movie to see in theaters is so much larger than 50 years ago.
For that reason, a film like "Gone with the Wind" sold more than 200 million tickets over the course of its initial release and additional seven rereleases in the U.S. For comparison, Disney's "Endgame" sold around 94.8 million tickets domestically since its release in April.