What is the disadvantage of proofreading?

One disadvantage of proofreading is that it can be time-consuming, especially if the text is lengthy or complex, which may delay project deadlines. Additionally, proofreaders may overlook errors due to familiarity with the content, leading to missed mistakes. This reliance on human judgment can also introduce subjectivity, potentially resulting in inconsistent quality. Finally, proofreading does not address deeper issues such as content clarity or structure, which can affect the overall effectiveness of the writing.