Every time you see a bike not splitting, you get home sooner. I guarantee you see more bikes not splitting than you do splitting, so in the end you're still home sooner. Secondly, motorcycles are growing in popularity (I think), so it will be more common. Finally, the more people that see you moving, and them not moving, the more will be motivated to either buy a bike and be moving also, or try to run you over. I'm hoping more will just buy a bike.
I drive a BMW, and I never hold anyone up. If I'm in the left lane, it's to pass. I don't stop at a red light in the right lane (if possible) so those that need to turn right can do so. I'm smart enough to know that if they're moving, it'll help keep me moving.
Legislations change. What's legislated today, may be different tomorrow. Legislation is always behind also. If tomorrow legislation changed and allowed lane splitting, would you automatically approve of such actions? Or would you still be bent out of shape because someone is moving a little faster than you?