I believe one of the reasons is visibility and positive role modelling. The concept of if you can't see it, you won't be it. So if this young woman demonstrates something new, then she may inspire others to believe they can be adventurers. Sidney Poirier wasn't the first black actor but was the first to be box office. He had everything going for him, looks, a great speaking voice and he could actually act. He in his turn led the way til we now have discussions for example about there one day being a black James Bond and where we accept many roles can be played equally well by anyone regardless of ethnicity. Could a black man play Jack Reacher if the physical type was right, definitely and far more convincingly than Teeny tiny Cruise.