"Can someone explain how it was a political opportunity?, to have the women's complaints handled by the police. In my view, it was the opposite."
The complaints were not passed to the police at the stage they were 1st reported or investigated, nor when the investigation had been completed. One of the complainants reported a serious allegation to Ian McCann who said he'd 'sit on it' and would deploy it later if necessary. She herself said her intention for reporting was to prevent Salmond from seeking to be elected again, having it on SNP record for vetting purposes.
It might be unpalatable to some, but the disclosure of Miss H was 'sat on' which suggests not concern with any wider implications but to be 'deployed' later - that's purely political, and not a 'duty of care'.