The most lethal weapon of the Luftwaffe fighters pilots was "their numbers"?
It appears to me you filled the blanks with the incorrect words.
Those who had numbers as their most lethal weapon happened to be the RAF and the USAAF.
So now it results the USAAF and RAF had superior fighters, superior engines, superior guns, superior cannons, superior gunsights, superior training, superior tactics, superior intelligence? Very amusing. I would like to have some pop corn here with me.
Any of the fighters of both USAAF and RAF could hardly deal with either the Bf109 or Fw190 in even numbers, or even in situations where the allies enjoyed a slight numerical superiority.
The dozens and dozens of pilots and airmen killed in action -of both USAAF and RAF- against the Luftwaffe will not let you have the whole cake.
The Supreme Eagle, which is Erich Hartmann, certainly helps on this: a pilot based exclusively in the east dealt with the dreaded Mustangs accordingly sending 7 of them down to the ground, with all 7 pilots killed.
(I recently learned some sources give Erich eight mustangs)
Excuse me, but no matter what kind of a genius Erich was, but had he been flying "a nearly obsolete plane" -like the victors address the late Bf109s- against the "marvel" they say the Mustang was, the outcome of Erich´s life could have been different don´t you think?
So what´s it going to be? It is either the Bf109 was not "obsolent" or the P-51 marvel was not that marvelous.