"Seems a bit cruel, holding it against your children just because your parents wouldn't let you."

Gendry had little concept of foods that were nourishing for you or simply indulgent. He'd never had any instruction in health. When you lived at the bottom, you couldn't afford to choose which foods were best for you, only what was available. So why not eat sweets all the time? It tasted good, so he reasoned it could only be good for you. Lords only ate the best.