Why do people just love to hate on their own existence? How many extinction events have there been that just wiped out the vast majority of species far before humans even existed?
If earth is to flourish, grow and continue it's trend of supporting ever more complex forms of life - it will be humans that can make that happen. In the absence of humans, earth is just awaiting another mass extinction event (maybe even _with_ humans, but certainly no other species on earth has had the capacity to maybe stop one of these events from happening)
Humans are freaking incredible, miracles that boggles the mind to consider how we even exist. I'm not sure why we pretend otherwise.