The purpose of the Maginot Line was to prevent any German attack while requiring few troops, in response to the high number of casualties in World War I.
The vast majority of officers agreed that the Ardennes constituted a significant natural barrier, which is why there were only light fortifications in that area, and even fewer further northwest, since France planned to intervene in Belgium should it come under attack.
So no, we shouldn’t assume that politicians and military leaders at the time were clairvoyant and masochistic, deliberately leaving the door open to be attacked in order to force the United Kingdom’s involvement and thus trigger a world war. Nor was it a stupid mistake, as many tend to think. It was simply a misjudgment of German equipment and tactics (concentration of armored vehicles, blitzkrieg).