Because NOTHING, never will prove creation!
How did you come to that conclusion? Think about it:
Fact: All life comes from a previous life
Fact: All information comes from a mind
Fact: All books have authors
[Quote]: A few years ago Sir Fred Hoyle and Dr. Chandra Wickramasinghe, Professor and Chairman of the Department of Applied Mathematics and Astronomy, University College, Cardiff, Wales, became interested in the problem of the origin of life. Both had been evolutionists and lifelong atheists. After making certain assumptions about the requirements for the origin of the simplest cell imaginable, they calculated the probability of the necessary protein enzymes arising by chance on this planet in five billion years. The probability turned out to be one chance out of the number one followed by 40,000 zeros! 41 [That's more molecules that there are in the universe]
This is flatly zero, so they calculated the probability of life evolving anywhere in the universe, assuming that every star in the universe (about 100 billion times 100 billion) has a planet like the earth and that the universe is 20 billion years old. For all practical purposes, according to their results the probability is not insensibly different than zero.
Sir Fred Hoyle said that the probability of the evolutionary origin of life is equal to the probability that a tornado sweeping through a junkyard would assemble a Boeing 747! One is free to believe that, of course, but it should not be called science.
Hoyle and Wickramasinghe are now saying that wherever life exists in the universe it had to be created. Wickramasinghe has stated that this evidence constitutes empirical evidence for the existence of God (they are not biblical creationists, since neither believes the Genesis account of creation, but they believe life had to be created).
Did Sir Fred Hoyle and Professor Wickramasinghe become creationists because of their religion? Obviously not, for they were both atheists when they began their study. They became creationists in spite of the religious beliefs they held at that time. Most evolutionists assert that to hold a belief in creation is religion. According to this view, then, when Hoyle and Wickramasinghe, in ignorance of the facts, held to an evolutionary view of the origin of life, that was proper science; but the moment the scientific evidence convinced them that life could not have arisen naturally, therefore life had to be created supernaturally, their views instantly ceased to be science and became religion! [Of course this is absurd]
Other scientists, such as Yockey, 42 Salisbury, 43 Coppedge, 44 and Wilder-Smith 45 have come to similar conclusions or have expressed serious doubts. A spontaneous evolutionary origin of life can be positively excluded based on the proven principles of chemical thermodynamics and kinetics and the laws of probability. The theory of an evolutionary origin of life is Twentieth Century mythology.
[end quotation]
Just to avoid confusion, the bible doesn't rule out "evolution" within "kinds" - limited speciation. Biblical "evolutionary" trees would look something like this (initial creation interrupted by the flood and then restarted):
https://www.youtube.com/watch?v=baLInKAUBa8