I was going to list some other uses for a potato ricer, such as pressing the water out of cooked spinach, then I thought, "What's wrong with having a specialized tool?!". We are surrounded by specialized tools.
Would your wife feel better about shaving her legs with her razor after you used it to peel some potatoes?
Would she feel better about brushing her teeth after you used her toothbrush to clean the bathroom floor?
Tell her you're waiting for the day you come across a very big clove of garlic. Then you will use it as a garlic press.