Literacy is one of the great tools of civilization. Etymology is one aspect of this tool. Your ability to read my writing—another. The moral imagination invoked is a third. Unfortunately, writing is a recent invention—we’re still getting used to it. As Sagan notes in The Demon-Haunted World (335):
For 99 percent of the tenure of humans on earth, nobody could read or write. The great invention had not yet been made. Except for firsthand experience, almost everything we knew was passed on by word of mouth. As in the children’s game “Telephone,” over tens and hundreds of generations, information would slowly be distorted and lost.