Would this door incident be specific to the 737 Max, or just general Boeing shoddiness? I thought the main big difference about the Max was the engines, and th

Would this door incident be specific to the 737 Max, or just general Boeing shoddiness? I thought the main big difference about the Max was the engines, and the ensuing software fixes to aerodynamics. But would the doors be very different to other modern 737s? Im wondering if focusing on the Max is a red herring and this is potentially indicative of issues with many more 737s. #armchair-aviation-geek