I have to disagree with most of your points. A computer can be programmed to make autonomous decisions, e.g. Deep Blue, the IBM chess champion. I believe that the architecture for the last several generations of massively-parallel was worked out with the help of other machines. But different brains exhibit different behaviors. Reptile brains don't exhibit much adaptability or creativity.
Some human brains fare little better.
I also agree that the brain receives input, not necessarily information. Autistics lack the ability to filter out the important input, so to deal with the resulting overload they withdraw. Dyslexics have difficulty parsing certain kinds of visual input. Certain chemicals can drastically alter the brain's perception of sensory input, resulting in hallucinations. If I read a poem by myself, I certainly interpret it in the light of my own experiences.