There are two distinct problems here that need to be discussed.
Work-life balance. Even when you want to dedicate your life to a single goal, you still cannot devote everything you do to it, because you will burn out and your productivity will drop. So walking in the park and spending time with your boyfriend are things that should happen even if you are trying to build an FAI. In fact, they are necessary.
Existential dread. Which is not a new thing at all, being Older Than Dirt, but is still as relevant as when the first human realized she is mortal.