I’ve gotten to a point that I feel like I’m at war with “realistic” when it comes to fiction that isn’t set in a real world. The more liberties you take with how the real world work the less you can defend something or call for something as “realistic”. What it needs to do is make sense to the rules set up for that fictional world. You can’t have an actual Captain America meeting Hawkeye Pierce or spaceships invading Middle Earth…though that last one could spark an original property (or possibly the next season of Amazon’s Rings Of Power) and be an interesting story.
Some people chose the shows, movies, books, comics, games, etc. in question to escape the real world for a while and recharge their mental and emotional batteries for what the real world is going to toss against them next. Author James Harrington defends this escapism against the “realistic” defense when used in a world that isn’t realistic by nature.