TightSlot and G XTY: OK, I take your point.
However, I maintain that on certain flights I have flown, cabin crew PAs relating to operational matters (for example delays) have often exacerbated rather than diffused a problem. It is better to wait to hear the real reason from the flight deck.
If I experience a go-around, it will be quite obvious to me what has happened. I don't need CC to explain that "the captain decided not to land"! However, I appreciate other passengers may think that God has intervened and sent the aircraft back into orbit. What intelligent passengers do appreciate, though, is an informed explanation for the go-around. And as you say, they may have to wait some time for this.