I've never understood the bias against potatoes. I mean, I get the glycemic index concept. But other than that, there seems to be this insistence that they are somehow "empty calories," which is simply not true.
EVEN without the skin, a potato is a significant source of B vitamins, Vitamin C, potassium, and copper, and contains smaller amounts of iron and magnesium. With the skin, the vitamin and mineral content soars. A potato also contains a small amoung (2g) of protein. Furthermore, the issue of glycemic index can be significantly mitigated by consuming the potato with plenty of fat, and alongside a protein-containing accompaniment.
Our favorite potato dish is colcannon. It is made by boiling whole potatoes with the skin on, and then mashing them with butter, milk, and steamed cabbage or kale.
Certainly, I'm not suggesting anybody should go and try and live on nothing but potatoes. But a potato is a good, whole food, and it irks me to see them so maligned.
FWIW, though-- russet potatoes are among the most heavily sprayed crops. It is best, if you must BUY potatoes, that you buy them organically raised. It is also extremely easy to raise potatoes yourself, even in urban areas. I live in an apartment, and raise about 50 pounds of potatoes a year.