Why bet against optimism? If you're right you and everyone else is better off. If you're wrong it doesn't matter because you and everyone else will be dead.
That bet doesn't really have any high impact on my personal life. It's just what I consider the most likely scenario.
Other than that I live in a normal pragmatic way as a programmer even though I don't believe the tech I work on is going to save the world or allow us to conquer the stars or whatever.