Perhaps you can't see ahead and weave and watch for traffic movements and light changes, and wing mirrors; other people can, and do every, day in large numbers. It's the responsibility of the rider to keep themselves safe during filtering, not the other road users.
Personal experience is that I saw 2 filtering accidents in 4 years; both on 4 lane motorways out of city. 1, a zx9r going between the Armco barrier and the right of a vehicle and hitting some debris and slipping off...no injury. 2 rider and pillion on commuter bike hit a cats eye whilst leant over between 2 cars, slipped and tapped a bumper and fell off. No injuries. During that time I would see 2, or 3, vehicle accidents (or aftermath) every week. So no sandwiched motorbike riders. Quite a few pedestrians clipped by buses, and cyclists stranded, or bumped, when the bus sets off when they are half way along the bus length (the bus being stationary at a bus stop and the rider overtaking, as opposed to lane splitting).
BTW the standard for driving in most countries is "Mirror, signal, manoeuvre". that would cater for all road conditions including lane splitting. Nothing extra required from drivers other than standard practice before any move (start, stop, change lanes, turn).
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