I think that to go on losing aircrew at the rate that BC was doing in late 43/ early 44 for no discernable result shows that the tactics/ strategy were wrong. Many BC men knew their chances were very slim, some described it as plain murder. Freeman Dyson, who died recently , worked for the BC Operational Research Section. It was staffed by about 30 civil servants and young academics. His first day was the day after the first raid of the Battle of Hamburg.He said the staff that day were elated, they were never elated again until the end of the war. It makes interesting reading, if it didn't agree with BC doctrine, then the powers that be didn't want to know. Many thousands of men died needlessly.