No 2013thevillages, the cyclist was not 'doing what they are supposed to do'. If the cyclist had taken the lane by riding down the middle, the truck with trailer would have exited the lane to the number two lane and passed. In so doing the truck would not shared the lane with the cyclist,
Road Cycling: Why Do You Ride Like That? - CyclingSavvy
I'll make it easier for you here is a quote from that link: Keeping to the right can often hide a bicyclist from a turning motorist at the critical time and place. Most overtaking crashes involve a motorist who attempts to squeeze past (illegally) in a lane that is too narrow to share. Check out this animation to see all the hazards that make staying far right NOT practicable!
Because it is state law that motorist must give cyclists three feet of space and cyclists don't run precisely on the roads edge, the road is never wide enough to 'share the lane' with a cyclist, NEVER.