If you have ever worked with a team of people who produces something, you will get it.
Many people, even the experienced ones, are waiting for you to check their work prior to delivering. They need explicit confirmation from you that you have checked it.
There are many reasons for this, but I think the most common one is: “If you check what I have done, the answerability for the outcome is yours, not mine.”
When offered such an opportunity, defy.
This ONE action might make the world a better place by losing a mediocre.