Or how about: So what if I can't do anything about big issues? There's usually something I can do because of those big issues.

If I'm aware of a war broiling in a certain country, I can avoid investing there. If I'm aware of market trends, I can plan my investments accordingly. If I believe immigration restrictions on educated workers will be loosened over the next fifty years, I can develop products that will be especially useful to people with green cards and white-collars.

Sure, you won't be able to do anything tomorrow, but that won't mean you ready yourself to seize opportunities that present themselves over the next decade or two.