Final answer:
The phrase 'to write is human' explains that good writing isn't always 'perfect' writing because human imperfections can be reflected in writing. Skilled writers make mistakes and perfect writing is unattainable for humans.
Step-by-step explanation:
The phrase 'to write is human' explains why good writing isn't always 'perfect' writing because it suggests that human imperfections can be reflected in writing. This means that even the most skilled writers make mistakes. It emphasizes that perfect writing is unattainable for humans.