Reasonable proposal here: both of your POVs can trivially be reconciled as follows: developers are marked in some special way, such that they can trivially be separated from non-developers. Perhaps the badge is a different color.

This improves the position of everybody in the network: those who want to talk with recruiters can do so, recruiters don't have to talk with anybody who would only waste their time and there be no reason to assume that women developers are not since gender would be a strictly inferior signal to the (non-discriminary) badge color.