Lets face it, we don't know what humans are. Science is doing a good job at uncovering many facts about us, but even science cannot explain consciousness yet. Conciousness is still a strong mystery to us. Is it important for you that, before you die, that we understand why we are here unequivocally? What do you think about people who do feel it's important to know?
Is yearning for such knowledge necessary, sab, or even realistic? Infinity, big bang, plasma, star dust, billions of years, galaxies, stars, planets, more billions of years, abiogenesis, hundreds of millions of years, evolution, millions of years, man, hundreds of thousands of years, you. What happens next hasn't happened yet and nobody knows what hasn't yet happened. Humans are stardust, like everything else in the universe. Consciousness? The enthropic principle dictates that you need to be conscious in order to perceive consciousness, but just because we can put it into language doesn't mean that consciousness is unique to mankind. Do you think that the other animals on earth are conscious?
So, is it important? No, not to me. If it is important to you, then it is important. If it isn't, it isn't, and it doesn't matter to me one way or another.