This uses a very common, very oft quoted, but also very wrong myth about why the Maginot line was created and what its purpose was.
Its purpose was not to stop a German attack head on, it was not to defend the entire course of territory that needed to be defended. It was instead designed so that the numerically inferior French army could free up as many troops as possible to meet the expected German invasion in the north. There is a reason all of the best French and British troops were positioned to meet the expected German invasion through Belgium and not anywhere near the Maginot Line.
When compared to its actual purpose the Maginot Line performed perfectly well. The Germans did not try and attack it, they instead attacked to the north, just not quite as "north" as the Allies hoped.
Its purpose was not to stop a German attack head on, it was not to defend the entire course of territory that needed to be defended. It was instead designed so that the numerically inferior French army could free up as many troops as possible to meet the expected German invasion in the north. There is a reason all of the best French and British troops were positioned to meet the expected German invasion through Belgium and not anywhere near the Maginot Line.
When compared to its actual purpose the Maginot Line performed perfectly well. The Germans did not try and attack it, they instead attacked to the north, just not quite as "north" as the Allies hoped.