They say that ignorance is bliss, but most of the time, anyone who reminds us of that saying is either ignoring something they should probably worry about or is about to get blindsided by it.
Regardless of whether the person who hit the big red button walks away whistling or cringes and waits for alarms, whatever they blew up is still gonna blow up.
And if they go through what these people just did, that might actually matter to them.