This is blatant discrimination.
Female pilots are just like male pilots - there's good and there's bad, just like any industry. Accepting applications, or preferencing for interviews based on anything other than ability and qualifications is illegal - and a text book definition of discrimination.
Perhaps many years ago, the management who instigated this scheme were once subject to discrimination for being female - and have an axe to grind. You'd have thought they wouldn't be so ignorant as to be unable to realise they're now doing the exact same thing to male applicants.
I've flown with some crap female pilots and many really good ones. Just like males.
The last few posters make a good point, too. Jetstar already has one pathetic little cretin who used her furry logbook to get to where she is today.
I say they hire the best people for the job based on qualifications and ability and experience - and be done with their little crusade.