It's a tragedy without question.
Riding at that speed on a road with so many entry and exit points is placing yourself and fellow motorists at risk for a catastrophic ending.
Was he being irresponsible? Did he have fellow road users in mind? The Answer to both rhetorical question is no, had he ridden at the posted speed for that road in all likelihood he would be alive today. At that speed it would have been difficult for the driver of the car to have seen him. No one in their right mind would deliberately drive in front of a bike, it's always because the rider wasn't seen for whatever the reason, inattentiveness, distraction, or the rider was blended into the background.
It's a crash that never should have happened, so sorry for the family and the driver.