While your historical knowledge is impressive, the fact that you have to go back to the 1950s to find planes that were more dangerous than the MAX says a lot.
The point is that we have come a long way in the past 60-70 years, and air travel is a lot safer than it used to be. If the MAX is a regression to the safety levels of the 1950s, then it has to be permanently grounded, because that level of safety is simply no longer acceptable.