Yes they might have all the nutrients but do they have them in proportion? Potato is a lot of carbs and starch, I can't imagine it or dairy having much protein.
There are 4.3 grams of protein in a medium potato, and 8 grams in a cup of milk.
The average person requires between 45-56 grams a day. Definitely feasible.
The average person requires between 45-56 grams a day. Definitely feasible.