2) Interesting to work on for the director and the crew.
If this was shot with a digital screen and a fan, that'd super be boring to produce.
3) Brings good marketing
4) Can justify paying expensive advisors / raising more production money (these stunts are difficult to financially evaluate so they can funnel out budget easily)
5) It looks more realistic (though it's not necessary a quality, as the story-telling is sometimes more important than realism).
Beyond that, there can be many reasons; for example, in a similar situation with Mission Impossible: Rogue Nation.
https://www.youtube.com/watch?v=afS5ks54tms
1) It's fun
2) Interesting to work on for the director and the crew. If this was shot with a digital screen and a fan, that'd super be boring to produce.
3) Brings good marketing
4) Can justify paying expensive advisors / raising more production money (these stunts are difficult to financially evaluate so they can funnel out budget easily)
5) It looks more realistic (though it's not necessary a quality, as the story-telling is sometimes more important than realism).