In what situation would someone remove their Guard?

In the new Clash of Clans update, a feature has been added which gives a player the option to remove their Guard.

What possible scenario would require a player to disable their Guard in this way?

If I see the shield is going to expire in the middle of the night, or at another time I won't be able to check my phone, I prefer to disable the guard/shield immediately, while my collectors are empty. Few hours later, with collectors filling in, the loots available to attackers would be much larger, or I could be attacked multiple times by looters that only target those collectors without granting me a new shield.