Because of this. You would see an interesting question, and enter the thread to read the responses and comments, only to find the the whole thread had been nuked. You would only find that out once you’d clicked into the thread, so I’m saying what was needed were tags stating something to the effect of “no comments here, don’t bother”

They needed some form of notice to users in the form of a tag at post title level when all the comments had been deleted.