Interesting post, I think I agree, but even if we should lower our confidence about almost all future predictions there should be some things that are more likely to happen and some actions that are likely to improve the outcomes of those things.
I would be interested in reflection about what those things might be, one possible example that comes to mind is climate change (which you mention) and another one is economic growth.
Whatever you give a man know that you are just a tiny bit of his life. He is struggling with giants. Try to be the most helpful tiny bit you can, but manage expectations.