But I do think you are wrong about intrinsic Robinson safety, and clearly the FAA agrees or they would have grounded them all long ago.
But expecting the authorities to do something when there is a clear economic benefit from jobs and the supporting industry is naive - even if there is s clear proble.
You can't ban guns in the US because of the economic drivers (and apparent assault on rights) even though they are inherently dangerous, especially in the wrong hands, and kill thousands of people a year.