WTF has this got to do with flying aeroplanes?
Not a lot, but then this thread is about BA recruitment, not being a Test Pilot.
BA's requirements "assume" you can fly an aircraft to the required (which is not exceptional) standard, and BA will provide the training to maintain / improve that.
The assessment / application process is designed to find those individuals who meet BA's requirements which include leadership, representing the company, going the extra mile, potential for training / management etc. Such matters as taking the care, and having the education, to write well are pretty fundamental to that.