the reason people call them mazboot is because their denter painter and mechanic told them so. By checking and looking at them they are pretty basic build and fragile cars. They will not survive any rollover or hard impact on the roof either.
You can test that by taking a sledgehammer and swinging it at the roofline joint by the A and B pillars of a new corolla. and If you try to smack it lengthwise - your hammer will bounce pretty hard.