And then only if the underlying problem really is a lack of assertion. Thus far, it appears to be a self supporting assumption.
I really don't think that is true. I cant think of any riding situations in London that would benefit from being less assertive. So I don't think its self supporting, I think its common sense that to communicate well with, ride with and be treated respectfully with, other road users, you need to be assertive... confident if you prefer. But I do take your point that assertiveness in itself may not be the cause of the high number of female deaths. Although I do believe its linked.
I'll propose a few thoughts (that others have suggested) and I apologise to all if these seem sexist or blunt but I am genuinely interested in trying to reach some sort of consensus, revealing or not.
1- Is my theory about rule breaking, compliance and general male ego in some way true?
2- Are drivers considering female riders less important?
3- Are men just genitically better equipped for cycling in a certain postcode...I know, I know it sound ridiculous but I'm asking?
4- Are drivers of trucks deliberately targeting female riders
5- Is something else going on