Lots of ifs there John, but I take your main point that the Luftwaffe withdrew rather than being simply defeated, but in doing so they conceded the field and hence the game. Hence our victory. Think of all the other ifs;
Dunkirk if Hitler had not stopped the panzers.
D-Day if Hitler had not stopped the panzers!
Kursk if Stalin had again rejected our warnings.
Bismark if that lucky hit on the rudder had missed its mark.
Tirpitz if that lucky hit at the bow had missed its mark.
Such are the fortunes of war. If ifs and buts...It's just that there seems to me to be an open season on the RAF of WW2, be it in Kent, Berlin or Arnhem. Only the Brits can turn triumph into defeat if the internecine warfare is bitter enough. So much water, so many bridges...