I think the myth that the Dresden raid was purely down to Arthur Harris was a ploy by Churchill to try and distance himself from the fact that it was actually on his orders that major area bombing was recommenced at that late period in the war. Not only Dresden, but three other eastern towns, were pencilled in for the same treatment. After the Dresden raid, the loud rumblings from the strenghening Labour Party caused Churchill to slope shoulders in order to try and protect his position.
I am not trying to denigrate the great man who brought this Country through its greatest test in recent history but, with the end of the war insight, I am sure that post-war politics was foremost in his mind.
Of course, all of this mattered not one whit to the crews risking their necks over what was still a heavily defended Third Reich.