It opens the space for less well adapted creatures to evolve into and adapt. For a short time (on an evolutionary timescale) you get a much larger variety of ad

It opens the space for less well adapted creatures to evolve into and adapt. For a short time (on an evolutionary timescale) you get a much larger variety of adaptation strategies until the best ones win out. Unless humanity completely erases life on earth I'm sure it'll bounce back. There's still time ahead, although not as much as there was behind. However, I'd rather we destroyed less and restored more, at least in my lifetime, so we could enjoy its existence.