I agree that magical thinking what-ifs regarding fictional works are a bit silly, but if fans of the work enjoy the exercise, then it’s worthwhile for them to engage in it.
On the other hand, I think well-constructed what-ifs concerning real historical events is quite productive, providing the what-ifs (counterfactuals) had a plausible chance of occurring.
History tells us what happened but asking “what-if” creates a new lens to explore the past and its impact on the present. History is contingent upon numerous things that have the potential to change everything. By looking at how things might have been, you can get a better look at why things are.
What if the Constitution did not pass? What if the Allies lost World War II? What if the Soviets got to the moon first? These events and many others could have happened (often by a very small margin), and they would have had a significant impact on our world. Understanding these alternate worlds helps us better understand the world we actually live in, and helps us understand the mindsets of people before the events occurred. Exploring these alternate paths provides a deeper insight into the reasons behind the current state of affairs.
I’m a couple lectures into The Great Courses series, 10 Great What-Ifs of American History. It’s well presented and fascinating to ponder.
The first lecture is titled, What If Lee Won at Gettysburg? Well, if the Confederates had succeeded in taking Little Round Top on the second day of the Battle at Gettysburg (only by sheer luck they didn’t), this may have turned the tide of the Civil War. The South wouldn’t have won the war, but something like this was likely to have occurred: a stalemate ensues, draft riots break out in NYC, Lincoln loses the 1864 election, a negotiated peace secures the independence of the Confederacy, France brokers peace talks that secure independence for the Confederacy in exchange for Confederate support of French interference in Mexico, France uses the slaveholding republic as a buffer zone, while the French-Confederate partnership pushes abolitionist Britain and the free-soil Union into an alliance. When France declares war on Prussia in 1870, Britain, the United States, and the Confederacy are drawn into a world war—all because the Union failed to hold Little Round Top.
The second lecture is titled, What If Lewis and Clark Vanished? They may not have succeeded, if a single grizzly bear succeeded in killing Meriwether Lewis (it was a very close call). There was no Manifest Destiny until Lewis and Clark succeeding in finding the Pacific Ocean passage. Had they failed, it would have reshaped America, Texas, and the Lakota Nation.
History is replete with close-call counterfactuals. They are important to consider.