Consider these two scenarios and let's see if there's a connection.
Let's pretend I'm a teacher who believes in grading students work and when they don't hand things in on time I deduct marks each day until the assignment is handed in. When kids don't believe that my assignments are a good use of their time or effort, I give them a zero.
I believe I am holding kids accountable and responsible for doing their job. I believe I am upholding high standards.
I am that same teacher who works in a school district where there is a no zero grading policy. Because I don't agree that this policy is a good use of my time and effort, I refuse to follow the district's no zero grading policy and am suspended from teaching.
The school district believes they are holding me accountable and responsible for doing my job. They believe they are upholding high standards.
The threat of a zero is the equivalent to the threat of a suspension. These are instruments of control between the powerful and powerless. Zeroes for students and suspensions for teachers have less to do with learning, accountability and responsibility and more to do with compliance and punishment.
How we feel about zeroes and suspensions all depends on whether we are dispensing or receiving them. The kid getting the zero is likely to feel the same way as the teacher getting the suspension.
This is why I cashed in my reward and punishment tool box a long time ago and found a better way to work with people, regardless of whether they have more or less power than me.