MrBernoulli, how long have you been in this game, that you can make such statements?
I don't know if you are a Captain or First Officer, but such statements open you to ridicule. As the crew on the day, you make whatever decisions are necessary to achieve the situation you are faced with, according to the airplane limitations.
I once had to fly a sector, gear down, speedbrakes out, just to arrive at destination around max landing weight. We didn't have the option of dumping fuel (aircraft type) , it was well within the airplane operating envelope and it was Operations that changed the schedule after we had fuelled up. Equally the pax were advised what would happen, but they were delighted because we arrived at their preferred destination.
Yes, ity was slightly more noisy than normal, but I think the pax enjoyed their G&T's.
And before you ask, CAP 56, yes, we did check the performace most rigorously, before we departed!