Beazelbub
I understand what you are saying.
But the 'you don't need to know' model is failing these days.
I don't know why anyone mentioned that there was a problem with the cargo door, as a problem is an open invitation for people to fear the worst.
If I had explained the problem, I would not have lied, but I would have said 'ladies and gentlemen, as you know aircraft must be loaded correctly so that the weight and balance is within certain limits. Today, to ensure that we stay within those limits, we will be asking you to sit in seats towards the rear of the aircraft. This is because we have more luggage and cargo in the forward hold. We apologise if this means that you have been moved from your original seats, but ask for your understanding and patience in helping us to operate a safe flight.'