Imre--
Perhaps everything that you are saying is true.
But while you are fidgeting with equipment settings in an
attempt to get the technical aspects correct, I'm busy
firing off shots to get the gist of the action.
I'm a stereo photographer, while you're
a stereo technician. If worrying about theories and
principles
is what you enjoy, you're welcome to fidget while
the action passes you by.
Marshall