Another possibility is that Doctor Strange had foreseen his own survival. Since he can see different futures, he might have manipulated events leading up to Infinity War in such a way that he would be in a position to survive. He could have set up safeguards or contingency plans that ensured his survival while still allowing the events to unfold as they did for the most part.
One reason could be his superior knowledge of magic. He might have found a way to counter the power of the Infinity Stones using his vast understanding of the mystic arts. For instance, he could have created a spell that made him invisible or immune to the effects of the snap.
Well, in certain fanfictions, Doctor Strange survives Infinity War because he has a hidden magical artifact. This artifact could have the power to shield him from the effects of the Infinity Stones. It might be something he discovered during his travels through different dimensions, and he uses it at the crucial moment to avoid being wiped out like the others.
No, Doctor Strange didn't die in the Infinity War comics. His fate was different from what was shown in the movies.
It might be that in that particular fanfiction, the author was exploring different themes such as sacrifice on a grander scale. Harry Potter sacrificing himself to save the entire wizarding world in a more permanent way than in the original story. For example, perhaps the threat in the fanfiction was so great that his death was seen as the only solution to end the chaos and darkness.
Perhaps Aaron has some genetic mutation or special ability that he was unaware of until the explosion. This ability could have allowed him to withstand the force and heat of the explosion.
The doctor could be using it as a form of relaxation. Reading fanfiction is a fun way to unwind, and Harry Potter fanfiction offers a wide range of stories within a familiar magical world. It can be an escape from the daily stress of a doctor's work.
The man could have been caught by some structures on the building during the fall, which reduced his falling speed. Also, his body might have a special physical condition that allows him to withstand greater impact.
Another plot could focus on Thor. After losing so much in Infinity War, he might become a bit of a recluse. But then he realizes that he has a responsibility to the remaining Asgardians and the universe. So he starts to gather the remaining heroes and form a new plan to fight against the consequences of Thanos' snap.
One reason could be the sense of mystery. People are naturally curious about the unknown, and crime fiction is full of unsolved puzzles at the start. Another is the exploration of human nature. Crime stories often delve deep into the motives and psychology of both the criminals and the investigators.
You could write a crossover story where Doctor Who helps the Avengers in their fight against Thanos. Maybe the Doctor uses his time-traveling skills to give the heroes an advantage.
One reason could be the alteration of major battles. For example, if in the fanfiction the D - Day invasion fails catastrophically, it would lead to a huge number of Allied deaths and a shift in the war's momentum towards the Axis. This would likely cause a domino effect, with more battles resulting in heavier losses as the Allies struggle to regain the upper hand.