Is it hard to live with seeing the future before it happens?

 Yes. It can be. It's especially hard when you see something that you cannot change like an earthquake that is going to kill thousands of people. This likely is the hardest. First of all, you see it coming and realize it's going to happen no matter what you do. In a situation like this all you can really do is to get out of the way of wherever it is going to happen if you are in the way of it. This is the hardest thing so far that I have to live with because most people just aren't going to believe you except for those who have seen you be accurate before which is usually very few people.

I can see how being a Tribal Shaman in a tribe of between 20 and 100 individuals how this would have worked though in saving the whole tribe in many different situations like in floods, fires or earthquakes or heavy winds over thousands of years time.

So, on a family or tribal level where there is familiarity with the gifts of someone who sees the future this would keep the whole tribe alive over hundreds or thousands of years if this gift is passed down to future generations genetically.