Life would be hellish if we didn't have the hundreds of millions of people working in this world. You'd be back in the Ancient Greece ages. YOU would have to raise your own food. YOU would have to focus more on survival than your individual feelings. You wouldn't be able to indulge in watching television, relaxing, decompressing. If you want to live in an area with less people, move out to the countryside, but I would kill myself if suddenly the population was reduced to 10 percent.
The world wouldn't function the way it would and I wouldn't be able to handle the stress of such a drastic change. Large predators would begin to move back into human territory and likely murder you when you're going out to get something. Because there are less people, there's less people able to research disease/plague prevention, say hello to even more suffering! You'd be living in a state of fear most of the time. Hardly a life worth living.
Humans are important because we are the first and only species to reach this level of intelligence. The African Grey Parrot is the second most intelligent species on earth. Thinking humans aren't important because... we're just animals like the rest of them? That is shortsighted and a blind take at that.
