I'd say that police and, e.g., infantry requirements and training are different.
A WPC* is useful as such and a desirable member of the team. She will have a peculiarly feminine approach and acceptability which will, in some circumstances, be useful.
If slightly reduced ability to carry a load is necessary, then I don't think that presents a training problem.
*Yes, I know that, like WRNS, WRAC and WRAF, they aren't actually called that any more.
