When I went through the MSF course, it was emphasized over and over that my safety was my responsibility.

Saying unconditionally that lane-splitting is "a sensible practice" is just more of the contemporary self-entitled trend of saying "this is sensible/logical/reasonable because it makes things more convenient for me ... to heck with the rest of you."

Lane splitters give ALL drivers/riders one more thing to have to monitor thereby reducing safety for all but most expecially for the rider. If you're on the road, you should be following the rules of the road, not demanding special rules -- that goes for autos, truck, motorcycles, bicycles, etc. I can find very little regarding laws or jurisprudence originating in California that I like or find logical/sensible/reasonable and legalized lane-splitting is no exception.