Can you explore without it? Can you create? Are there any futures ever made absent hope? Is that too many questions? I hope not.
I disagree with the notion that hope is something idle, inert, amounting to little more than wishful thinking. Maybe it's a matter of definition or semantics — hope could mean something flighty to you and concrete to someone else. But if expectation is the birthplace of suffering (and it is. Prove me wrong.), then I think actionable hope is its antidote... and maybe its benign cousin.
As the old proverb says: the last thing to die is hope. That it's a Russian proverb feels significant just now.