Some people need to get off their high(heavy) horse.
We all understand that it is the commanders prerogative to do what he feels he needs to do. We all get that it increases your safety margin to land on a longer runway. And we all understand that if you say you need it you will get it.
This is not some special knowledge that only heavy drivers are privi too. The argument is whether that demand is justified.
Our job is full of safety margins and people use their personal buffers within reason but just because you are the Captain and you are allowed too isn't a reason to go over the top.
Do you fill the fuel tanks to the brim (or MTOW) for every flight? Surely that is safer?
Do you refuse all intersection departures (LHR 09R-N10, LAX 25R-F)? Why accept it, it reduces your safety margin and you are the Captain!
To say "I'm the captain of the ship, I call the shots and I demand the long runway (because my company tells me what autobrake setting I'm allowed to use)", is hypocrisy at its best.