Originally Posted by Mjölnir
Compare that with the first Iron Man, where I'm not at all encouraged to wonder if something works, or makes sense, in reality since Tony starts out making a huge leap in energy technology in a cave using parts from weaponry. Stories are just expected to make sense in their own built up context.
That's suspension-of-disbelief due to in-universe logic, not "realism."
Not that I think "realism" should be held up so high on the pedestal of standards that some fans place it upon.