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.
A collapse can mean many things, not just that we will all die. It may just means that 80-90% of the population will have to work in food production.
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.