They weren't specifically farming potatoes. It was an excuse. Look into it. The Irish population then was larger than today. It was serfs on agricultural estates. Big estates, manors, castles, feudalism. Okay. Small hiccup. The British pull out. They were the land owners. They shipped all the food out. It triggered mass famine. Not because there wasn't food. They took the food. They even destroyed the food. Grains, livestock, vegetables. The potatoes were a stupid excuse for changing supply lines, laws, and distribution. The population dropped by millions. They starved them out. Better blame the blight instead. Like Ukraine, Russia. An excuse for new regulations, new methods, redistribution, supply lines, and laws.

Everybody knows potatoes aren't a diet. So where did the food go? Above.