Words should be chosen and used carefully so that they convey the meaning or meanings that you intend--and do not convey any unintended or double meanings. Writing should leave little ambiguity or uncertainty about what you are referring to--unless some purposeful ambiguity is desired. Sometimes words that are abstract or superficial may be chosen to suit the writer's purpose. For example, there is a long tradition of euphemistic writing. But such use of words should be well-considered and deliberate, not the result of carelessness or indifference.