It can be valuable to write them up. As one writes down the details, more and more comes into view. At some point one is "done" and generally feels good about what one has now brought into the light, even if no-one else reads the write-up. However, from this point it can go disastrously wrong.
An ethics program based on what was disclosed can be beneficial, but very often isn't. "Putting things right" can make one feel good, as in doing the right thing at last. But it can also lead to degradation if it is not self-determined.
If one is forced to write up more, for whatever reason, one will then likely feel degraded. If the write-up is used as leverage or blackmail then one will not benefit from that.
It's not a black and white subject at all.