You know what reassures me that nothing has gone wrong? When unexpectedly I am greeted with big white text insisting everything is okay. Imagine if you got a letter through the post out of the blue saying "You don't have cancer." I can only imagine how I would probably suddenly be a lot more worried about having cancer than before having gotten that letter.
Whoever came up with that idiotic dialogue is unhinged and detached from reality and has no business touching a user interface.