I think that's a common assumption, but as the other commenter said, libraries (and archives and museums) are fundamentally concerned with applying structured metadata to unstructured information and organizing it. The tools for doing this have always been highly technical even before they were computerized.

You can definitely still pick a more "traditional" library career and avoid working with computers more than absolutely necessary if you want to, but the training will still expose you to a core set of technology concepts (database systems, digital resource management, metadata essentials, etc).