Not sure I get all your points sslobodan but having worked at my current place over a year now I can confirm that being able to create or even read Engineering drawings is not a pre-requisite for employment in an Engineering capacity.:-(
We could get rid of a the fancy terminology & standard conventions etc on drawings but then we'd have to have several sheets of notes explaining what we meant.
I think I'll stick with the drawing conventions etc outlined in the various national/international standards.