system
Given the following post, respond as if you're commenting on Reddit:
human
[John Carter of Mars] Questions in general.

1. The omnipotent people, what's their deal, do they not have anything better to do than help civilizations destroy themselves. I mean they even go on to explicitly say, they don't bring about the end, they just help it along, which means the end is going to happen, so why help? Why not just go be immortal elsewhere.

2. After John Drinks the liquid that lets him speak English, he goes onto to talk with a girl about the planets, and she calls them all things he couldn't understand. Why didn't it translate the planets names into English?

3. Kind of nit picky, but how come John, or the martians didn't get sick when interacting? Hell, I've got to take shots just to leave my country, yet he can leave the planet and his immune system holds up just fine?

4. John got sent back to Earth and he was visibly older but not dead. Apparently the thing that sent him to mars simply copied him but sent his consciousness to Mars. I ask why his body on Earth was older, but not dead since he didn't eat or do things people need to do.

5. The aliens that wanted to kill John on Mars, sent him to back to Earth and didn't kill him there, they just sent someone to watch him. Why not just kill him?

6. The aliens orchestrating the destruction of mars, said they don't bring about destruction they just help it along. They also said for all intents and purposes they don't even exist. Yet in the end, one of the aliens is seen by several of the martians, wreaking havoc at the wedding, killing people, and firing off crazy new weapons, why would he do all of this if he's supposed to be a shadow?

7. On Earth John spends a lot of time finding a way to get back to Mars after the aliens sent him back. So much time it seemed to be years, yet when he does get back to Mars it's like no time had passed. What gives?

8. Final question: Was this something of a time travel flick? The mars in our space now, couldn't be so busy, as to be having a war going on, could it?
gpt
#3 

You've got to take shots because you are visiting places with other humans (any disease they can contract, you can contract).

Diseases typically don't jump around species easily even when they share a lot of common DNA and other commonalities.

The Martian flu won't have any clue how to infect you.