Because it will automatically detect if there is a miss and you can actually use the screenshot for debug reference.

ex:
reading per troop then calculate total.

80 archers x1 =80
+
80 barbs x1 =80
+
8 giants x5= 40
----------------
Total as Calculated =200

Camp as read =200

if not equal then bot takes screenshot.

I'll test it all day once maintenance is over.