The US military has taken the lead in social issues in this country for many decades. Gender hasn't been a consideration in military pilot hiring for nearly 50 years (other than height for ejection seats and combat restrictions). With the gates wide open for decades, the military hasn't come anywhere near 10% female on the flight deck. For UA to achieve its goal, it will necessarily require a massive disparity in standards due to a sheer lack of volume and interest - it's just basic math, not a comment on any social issue.
I would also add this thought. Have fun negotiating a contract in 15 years if a third of the seniority list is beholden to UA for their only skill set, their employment, and has a $100,000 debt to the company. That should make for a very steely-eyed pilot group at the negotiating table (sarcasm intended).