Use some reading comprehension skills fellas...
For the past year, it has had a policy in place to aim for an even split between male and female candidates for interviews and shortlisted for jobs. If that cannot be achieved in the event nobody from a specific gender applied or met critical technical and safety qualifications, an explanation must be provided.
So it is not a 50/50 recruitment split, just interviewed and shortlisted. They can still pick the best candidate for the job regardless of gender.
Clearly they don't recruit every female who applies if they haven't reached 50% they just send an email upstairs saying "we only got 5 female applicants for 20 jobs so we won't hit the target this time". Simple really.
Fixing gender imbalance can't be achieved by any one action alone. You are quite right to say there needs to be action at grassroot/highschool level. But there also needs to be action at the highest levels of the industry too. The media around this story is exactly the sort of thing that spurs grassroot interest.