To add another aspect to this debate, I would offer the view that some women ARE up to the challenge of military flying, but not all. Its just a small percentage compared to men.
I think the problem lies more with the recruitment/training hierarchy in the RAF who have recently made much more effort to get a female through to the front-line than a male.
I know of females chopped from rotary BFT/AFT who got immediate multi-engine re-streams..... at the same time as other (male) pilots chopped from AFT, OCFs and sqns were unceremoniously thrown out of the Branch.
That may be a problem with the top brass I hear you say, and not with women as a whole.... maybe so. But it doesn't mean that the same number of women out of a thousand (for example) are as suitable as their male equivalents to become aircrew.
If that were not true, then the ratio of male/female pilots would be 50:50!