It seems to me as though there is a clash here of real life experience of both the police and misogyny in general, and police procedure which purports to be helpful for the victim.
If it's someone's job to go through your life with a fine tooth comb to find something that the defence can use against you, things like sexual experience, purchasing decisions, social services records, pornography usage, should all be deemed out of bounds. And if the defence is using them, it should also be deemed out of bounds.
It cannot be beyond the wit of the police to ONLY access messages between the victim and the rapist in order to determine circumstance. And confiscate the phone for a day. I mean it's only actually the work of a day. Why would you need to hold onto it for days before, and days afterwards?
Aren't the police, as a cohort, pretty poor when it comes to exploitation of vulnerable people and domestic violence?
It's little wonder that women do not want to give them extra leverage.
And this is not me being dramatic, or hyperbolic. Many women have zero faith in the police when it comes to sex crimes.