There is a plausible scenario where a user cuts their wrist open cooking dinner. You don't have to file the edge off cooking knives, but won't you think of the children?
Kitchen knives actually do have safety features, such as non-slip handles and finger guards, which users appreciate. I certainly do. Users also appreciate safeguards in cli tools, such as not deleting all data if input happens to be slightly wrong. Sure, you could design your tool to be used exclusively by leet hackers, but the idea of sanitizing your inputs is not completely preposterous.