Humans in the future have the ability to travel back in time to most locations including right now

 So, this might be important for you to understand. But, if they change things in certain ways the ones visiting here won't be born at all. So, what they do is really important the way they do it so they don't prevent their own births by messing with the present.

So, they usually see us as distant relatives in the past like you would think of grandparents or Great Grandparents like that, especially if they meet someone they are genetically related to in the present or past.

So, they need to keep those alive who allow them to be born or they won't be in the future.

So, the people who come here from the future of earth mostly want their relatives to stay alive so they can be born. This makes a lot of sense to me too.

Just like we have Artificial Intelligence right now technology evolves to where time travel becomes more and more normal in the future too. Right now people aren't told about this and mostly they aren't told about this in the future either. However, it is used both now and in the future by people in governments around the world and sometimes by businesses (corporations too) that are rich enough to get a hold of Time Travel.

I think this is a part of why people who are trying to protect democracy worldwide are having such a hard time  because it's pretty obvious that techies like Musk likely have Time Travel (especially after rummaging through all government files about stuff like Musk and his people did when Trump first got in.

It's no accident that Musk is a Trillionaire after rummaging through secret government files when Trump got into power. 

First of all he could blackmail almost anyone including Trump if he wanted to (but this would never become public) because people would be killed by Trump or Musk to prevent all this.

So, we live in a very strange world now but I would be much more afraid of people like Musk and Trump than I would about any Aliens from space for a variety of reasons.

This is just my thoughts as a 78 year old American who has seen a lot happen since I first became aware more of things at age 2 in 1950.