All jokes aside, what you state in general terms is true of all life on Earth, which is why it's amusing to me when info-tainment narrators on the Discovery Channel talk about how the Earth is perfect for life--it has water, oxygen, it's not too hot or cold, it's just far enough from the sun, etc., etc.
No, dumbass. We're just what life happens to look like given those conditions. Change the variables, and you get different life, and somewhere Zork the nine-legged asymmetrical silicon-based life form is on their Discovery Channel (probably called the Discouvery Channel) talking about how perfect the planet Brorsecock is for life: ice cold, full of silicon, far from the damaging rays of the sun, no highly flammable oxygen, etc.