Tesla Autopilot Crashes into Motorcycle Riders - Why?

I don't really have anything to back this up, so take it with a massive gain of salt, but I seem to keep seeing discussion of Teslas hitting bikes (both cyclists and motorcycles). Most of it centers around there being enough doubt about whether Autopilot was being used, or whether the driver was actually monitoring like they should have been, or whether the cyclist "should" have been in the road, etc, as to "count" as being less safe. I can only imagine that there are impassioned interpretations of the data going multiple directions. A Verge article [0] has some discussion on this with regard to a motorcyclist that follows this pattern, and FortNine also covers this in a characteristically well-made video [1]. There's also the problem of autonomous (electric) cars being too quiet when they first begin moving, but that's easy to solve. So I'm not entirely sure about their safety being "proven", but that's largely because the problem domain is enormous and the data somewhat open to interpretation. Overall "proved" seems too certain a word as of now, without narrowly defining the scope. [0] [link] [1] [this video]