If the Air Forces and Navies of the world had a better way to drop in the old dip stick and figure out whose aptitude matched the needed traits best, they'd be using it.
To take it a step further, there is a big difference between being a good pilot flying a fighter in oeacetime and a good fighter pilot in war. The difference between those, who when the bullets started to fly, became one of the few hawks amongst the many pigeons.
And I believe post-analysis showed many of the former to, in many cases, having been rated as average or below prior to combat having commenced.
E.g.
https://www.warhistoryonline.com/wor...ne-fokker.html