Every book collection reflects its owner’s personality. A unique mix of gothic novels, engineering manuals, romantic poetry and cookbooks are like strands of DNA. Just as people change, book collections also evolve.
I know you’re joking but it’s absolutely possible to love books even when most may be unread. Umberto Eco sings the praises of the so-called “anti-library” here: https://www.themarginalian.org/2015/03/24/umberto-eco-antilibrary/