You always have to do everything right

A.: I killed another moth today.
Mom: What's your point?
A.: My point is you should eat the food you have before stockpiling more food.
Mom: What, you don't have moths?
A.: No. I don't leave anything out for them to eat. My flours are in the freezer and fridge and I go through my grains before buying more.
Mom: You always have to do things so right, and that's not right.
A.: I just don't want moths eating my food.
Mom: So what! Moths! Whatever.