Ghostbusters is probably the one my argument is the weakest for - but still, its not about the rating but who the most targeted audience is. Ghostbusters is a comedy aimed at adults (or teens at least) which can also be suitable for kids. Super hero movies tend to be aimed at kids first while also being enjoyable by adults (or at most equally aimed. After all so much of the money comes from toy sales).
i think a more fair historical comparison would be original star wars trilogy to current marvel movies.
Famously, Lucas insisted on Carrie Fisher not wearing a bra in some scenes in the white flowing dress, and also put in the somewhat gratuitous bikini scene. You wouldn't get away with that today.
i think a more fair historical comparison would be original star wars trilogy to current marvel movies.