I think you are right Senator, from all the posts in the forum there is the feel that if travelling long haul it is cheaper to start ex-Europe on BA, or use another airline connecting through a European or ME hub.
It is very much supply and demand and also knowledge. We on the forum are informed and enquire, but how many other business and leisure travellers are not? Far more, probably the majority. Therefore if the want to travel from UK to wherever they will pay the fare quoted, no questions asked