The mechanism of evolution, natural selection, had nothing to do with the original appearance of life on earth. And frankly, I don't see what difference it makes what you believe or imagine. Crystals also spontaneously organize when conditions for crystalization exist. You just don't understand the chemistry and the laws of probability involved. Organic compounds like alcohol, a simple sugar, and methane, a hydrocarbon, have been detected in comets and in clouds of gas in interstellar space.
Water is also common in the universe.
Combine them with heat and the chemical reactions necessary for more complex organization of compounds occur. The occurance of life from any particular bunch of molecules may be very low, but because these conditions are so prevalent the law of very large numbers makes the overall odds for it very high. It works like the lottery. The odds that any one combination of numbers will win are very low, but with so many tickets sold the odds that the numbers that someone has selected will win are very high. Anyone can place cake ingredients on the kitchen table but it takes a chef to make a great cake.