I‘m not sure about the insurance thing as I know too little about this market but that plane is going to be a ticking bomb - at least public relations wise - even when finally cleared to fly some time. Given how many of them were produced and will be delivered in future another one will be going down sooner or later. And whereas all commercial airliners in the last 50 years (maybe except the DC10) had the benefit of doubt that the root cause will most likely have a significant portion of pilot error included, the 737Max will not. So if it’s not CFIT in mountainous area and bad weather or a mid air collision, fingers will be pointed against the aircraft and it’s manufacturer.
And even the last backwoods journo from the Podunk Herald does now know that this plane was deprecated before its first flight, like a hotrod made from a chasis of a 60ies Volkswagen beetle, stretched and reengined with a supercharged direct injection engine, but without anti skid sytem.
So it’s gonna bite someone in future. The question is, will it be Boeing who will not provide a successor in medium term, the airline which is flying this 60ies plane in 2030 or the regulators who will be allowing this continue for indefinite time?
People will not care because they are all hoping to be in a different job position or retired when it is going to happen.