Could still be a net win. If this increases overall rider count, it would tie up women drivers leaving more of us dirty-bastard-rapist-man drivers to take other rides for the non-paranoid riders. Or it could also increase women riders which might use the women-only option for now, but when they can't get a women driver in good time, they may opt to take that HUGE risk of a man driver after which they'd find there's no problem (in 999,999,999 of 1,000,000,000 cases when having a man driver) after which they'd be fine having a man driver in the future.
That's a super convoluted paragraph but you get the jist. 🤪