To answer the other part of your question (downloading directly into our brain/nervous system), we don't. We hyper-train each ascendant brain in the brutal practice of undeceiving the self, and then either collect from curated sources (preprocessed informatica) or scrub first hand accounts for trace forensic Truth ourselves.

Information (resolve of uncertainty) is a valuable commodity. That is the nutritional basis for the ecosystem of autonomous, self discerning minds. It must be chosen carefully by taste and digested in the bowels of each and every comprehending mind.