to be honest crab your arguement and points are well put and I accept them fully. In some respects it reminds me of a time when I was a young lad and the local harbour acquired a state of the art lifeboat costing a considerable sum. I remarked to a lifeboatman that it was a lot of money for something which in those days exercised once every three weeks and perhaps twice in a few months saved a life.
He responded that as far as he is concerned its paid for itself fully after the first life is saved, and everything after that was profit. That remark stayed with me and i guess I have my answer from yourself. many thanks for your patience!