Using a computer analogy to try to understand the brain functions is ok as long as we remember that the brain is not actually one of them. There have been different technological analogies throughout history including hydraulic systems, telegraphic and telephonic lines, all of them might seem comical today but they were the best explanation at the time, same will be in the future with ours, comparing something like the brain (or rather the whole living being) to a mathematical processing device is more than short sighted. We try to explain everything from the engineering point of view by isolating things but that’s not how life or the universe works.