The problem is you use the "God of the gaps" argument. Because you do not have an explanation, you decide that it must have been God. This is the same reasoning that the Greeks had when they said Zeus was making it rain by frowning.
Just because we don't know how something happens, does not mean a supernatural being made it happen.
Also about your question with our planet being so constant. 60% of its surface is inhabitable due to (undrinkable) water. We also have deserts, or even tropical temperatures that make life very difficult, except that because of evolution, some species managed to adapt and survive, and even then it is not very efficient. Many birds, just to survive, have to migrate to other climates every year. This is not efficient, and this is far from perfect.
Also, the reason we do not find two similar people is because our DNA is very complicated and the possibilities are very large, and if you add nurture to that, it is logical that you cannot find two similar people (except of course for twins)
Just because we don't know how something happens, does not mean a supernatural being made it happen.
Also about your question with our planet being so constant. 60% of its surface is inhabitable due to (undrinkable) water. We also have deserts, or even tropical temperatures that make life very difficult, except that because of evolution, some species managed to adapt and survive, and even then it is not very efficient. Many birds, just to survive, have to migrate to other climates every year. This is not efficient, and this is far from perfect.
Also, the reason we do not find two similar people is because our DNA is very complicated and the possibilities are very large, and if you add nurture to that, it is logical that you cannot find two similar people (except of course for twins)