Why do Steel Watchers have 10 AC, plus their hilarious Dexterity? Why do they have that Dexterity (as their highest stat, no less!) AND Dexterity save proficiency? They are designed and animated as lumbering behemoths of steel and hell-forged iron, yet they are only resistant to non-magical weapons, and their base AC is nil?

I don't want to think about why my eye is itching.