Google, there is a ton of stats out there.
In my experience not all drivers check properly for other cars, let alone motorcycles when changing lanes, which is one reason lane splitting scares me a little. Lane splitting requires putting a lot of faith in other drivers to not open their doors at an inopportune time and check before they do, and not pull too close against an adjacent car in traffic, another reason lane splitting scares me - I can never bring myself to put 100% trust in other drivers.
So how does this check out?
You don't trust the person waiting to turn left in front of you, to NOT turn left in front of you. You expect them to do it.
You don't trust the person waiting to turn out of a side street in front of you, to NOT do it. You expect them to do it.
You trust the person behind you in traffic to see you and stop in time not to kill you, even though you saw them looking down in your rear view mirror when approaching the light.... Am I getting this right? You've already experienced what it feels like to be rear ended in traffic, which is more than I can say, and I have ZERO desire, or intention of being in that position.
If I even suspect someone is on their phone behind me, or I have any doubts they'll stop in time, I'm between the cars, no hesitation. Would breaking the law every once in a while have resulted in you not having been involved in your incident? What would you consider worse, objectively? Filtering at the equivalent of a jogging pace through traffic and someone negligently opens their door, perhaps you bend their door frame... Would that be better than what happened to you? I don't see how it isn't.
Filtering is totally empowering, and only someone who has never tried it could make the statements you are making. In stopped/slow moving traffic (IE: What we're pushing for here in BC) filtering is totally benign. We already expect the unexpected, right? So someone opening their door while you're theoretically filtering is ok, because you're expecting it and have your fingers on the brake lever...
I'm way more scared of being involved in what happened to you, than someone negligently opening their door on me in traffic. I can plan for that, and adjust my speed differential accordingly, you can't really prepare to evade being smashed from behind in traffic, obviously.
You should try filtering some time, you might find it really isnt actually that scary, its actually REALLY nice, and once you realize how efficient and logical it is... Its impossible to stop.