I must have missed the 'abundance' of idle 747s in the hangars at LHR which are not being utilised as best as BA see fit right now, all earning them no money at all and losing a fortune just to be sitting there ready to go at a moment's notice based on the well-known and highly profitable 'sure, why not' management ethos

According to the last report on the BA Shareholder website, 744 utilisation is (was) 13.3 hours a day per aircraft. Higher than the 772A (12.6) and 772IGW (12.7) variants which combined make up the majority of the 772 fleet and just under the 16 (now 15) 772ER (13.4).

That doesn't even take in to account crewing/staffing issues (when BA were first putting the 772 on the SYD runs instead of the 744, I recall some very interesting posts from Panic Stations about initial shortages of appropriate flight deck crew to cover the requirements of such a change). Now they're one aircraft down, even more pressure will be put on utilisation across the fleet too I'd imagine.

It's almost as if you think BA plan their routes by putting a bunch of monkeys in a room and encouraging them to pick up a pretty coloured dart of their choice to represent the aircraft type, then throw it at a map to pick the destination