I am not a graduate engineer - --
Just too interested in other things.
Maybe I misinterpret some of what I see in aerodynamics -
I look at it all as a batting average.

As long as I get the results I am after -
Does it really matter how I do it?
As for dumb engineers -
My ol flying buddy -who was Prof of Engineering- confided that he felt 10% of the graduates were really capable - and not from failure of their academic studies .
It is unfortunately true in many vocations.