@ Detective- They do matter somewhat, It's mentioned that all IS pilot representatives need a high aptitude to be picked and stay in their position, Cecilia even worries in volume 5 since her ranking is A- she could possibly be replaced with someone else, so it's either the author forgot that the aptitude doesn't matter at all or its a retcon
*Sits back and waits for box to start eating his chair*
@Wavehawk- I met girls somewhat like her but I still had traces of gynophobia back then so I didn't really try to pay to much attention to them.