Gravitas: Singapore Airlines Turbulence: Should flight safety rules be changed?

A passenger was killed and 30 others were injured after Singapore Airlines flight from London was hit by severe turbulence over the Andaman Sea. Passengers who did not have their seat belts on were thrown around the cabin, many hit their head on the overhead luggage bins. As climate change makes turbulence more common, isn't it time to also change the rules of flying? Should seat belts be made mandatory throughout the flight?