I don't feel completely in control. I'm not so arrogant that I think that I can't come to grief, but I will accept some risk. That's a personal decision that I would not want my family or Boris bikers etc to have to make. I should campaign more. You are right.
In motorcycle terms you come across the definitions of the verb to filter
I filter,
He wobbles,
They weave like a bastard.
or some such.
Perceived risk is a very odd thing and quite personal to the vehicle you are on, its characteristics, and how comfortable you are with it. Hence cars will rarely try manoeuvres that motorbikes would be happy with, cycles may do stuff motorbikers would think insane, etc. It's why when you are driving down the motorway you see motorbikes filtering at 70. It's because at 30-50 filtering seems normal and you can easily get in to a position where the general traffic has sped up and 70 seems normal, until you realise what you are doing and you are going to get nicked for it.
While I'm very careful with traffic moving in my direction on the bicycle, I sometimes find myself taking gaps with traffic coming towards me that I'd consider tight on other transport.
It's an odd thing.