Why do contributors delete their own posts?


A significant contributor who shall remain unidentified deletes posts shortly afterwards. It’s not done with the intent of correction, but for the purpose of limited viewing. I wonder what rationale warrants this behavior. It certainly not for the benefit of providing context for later viewers who might want to learn from the thread. 
128x128celander
Post removed 
Nope
When mods remove your post it says exactly the same as when the OP of the post removes it.
Just tested.....
I deleted a post one time because I asked a question and then later noticed the answer was already posted and I had missed it.