I'm more a plodder these days.However I will still go L for leather on dangerous roundabouts.Very aware and aggressive cycling means you can out sprint traffic and greatly reduce risk.It is probably why naturally more cautious females appear to be at far greater risk here.
I'm not sure I agree with the gender-related part of this argument... I see little evidence for it. My daughter displays no 'natural caution' on a bike. She's played torreador with taxis in Paris and won.
However, to date I have found that a 'sprinty' approach to junctions and an 'all knees and elbows' approach to getting through traffic does have safety benefits.
In the past I've called it the Schwantz or Simoncelli method of making space, but recent events have made that comparison invalid (and perhaps even draw into the question whether using it is in good taste).
So... I agree that speed and assertiveness 9rather than aggression) can help, but I don't buy the gender thing.