Have you ever actually looked at our planet? How many places on Earth would actually kill you if you were there? How many places on Earth are lethal to life in general, let alone human life? I’m sure in your natural state (meaning completely naked and unaided) if we dropped you just about anywhere from where we originally evolved from you would eventually die due to the environment.
So let’s talk hypothetically, if we dropped you in the center of Antarctica (or any other living animal for that matter) you would quickly freeze dry within a few minutes. I’m sure if we put you on top of Mount Everest (or any other animal for that matter) you would suffocate and die (if not freeze to death very rapidly first.) If you were put on the bottom of the ocean (which by the way makes up 70% of the earth’s surface) you and many other animals would instantly die ( FYI you would be crushed by the sheer pressure of the water before you could drown). I’m sure if we put you on the middle of a salt flat somewhere in the Kalahari Desert you would eventually die and completely dehydrate into a mummy, same goes with most other animals.
By the way salt flats in deserts are not very uncommon as deserts make up some 33% or a 3rd of earth’s non water covered surface. That’s just short of 10% of the entire earth’s surface when you include the water of the oceans. So that means 20% of the earth’s surface is left… but that also includes other things like tundra, artic and subartic, mountains, temperate zones, rainforests, and tropical regions. In our natural state, we can only survive in tropical regions. Tropical regions comprise approximately 7% of the earth’s dry land surface or just short of 2% of earth’s total surface and sustains over 50% of all species, that’s not very much space… In-fact if you just stand out in the sun long enough you would eventually die due to exposure… These are simple facts.
There are very few areas where a human can naturally survive, and those areas are filled with very large predators that evolved to eat us. For a place that was supposedly so perfectly created for us, it sure seems to want to kill us a lot; and has a great deal of completely uninhabitable areas and areas that are inherently dangerous to we fragile humans… So much for that intelligent design hypothesis you had.