GOULI :
They sent crews to same age to war 70 years ago. They flew in overloaded bombers with basic navigation equipment, with people trying to stop them all the way there and back.
and the attrition rate was 1/3 , even half on some types in space of 2 years.
On the B17 ops ( well documented) life expectancy per airframe was 13 missions.Roughly half due to the Germans, the other half due to in-flight collisions ,nav errors on way back and attempts to land in bad weather. It was even worse in 1944-45 for the Germans where their fighters attrition rate soared to between 1 and 5 missions per airframe due to inexperienced pilots.
But we are comparing apples and pears . You can learn to technically fly any type of a/c in 50h of sim , the WW2 kids and any MPL today proves it.
You cannot shortcut experience.