In truth, relying on the system, Yuan Zhou could win without doing anything. In the system's own words, Yuan Zhou could master both Chinese and Western cuisines.
But Yuan Zhou himself had once said that he first learned cooking to make money, but as his skill improved progressively, he started getting interested in cooking.
Yuan Zhou was similar to many people. When he first learned cooking, he did not like it. But as time went on, he started liking it and eventually even started pouring in a large amount of time and effort to it.
Thus, during the free time in the afternoon, Yuan Zhou would not slack around. Perseverance was crucial to improve cooking skills.
More importantly, if he did not practice cooking in his free time, he did not have anything else to do anyway. This was a luxury only afforded by singles.