Why is integrity so important?

Because it demands truthfulness and honesty.

Explanation:

Having integrity means being totally honest and truthful in every part of your life. By making the commitment to become a totally honest person, you will be doing more to ensure your success and happiness in life than anything else you can ever do. Integrity is a value, like persistence, courage, and intelligence.

integrity is important because it means you're doing the right and good thing when no one is looking. it also shapes you into a honest person