After all, for most ordinary people, eating is merely a means to fill their stomachs, and after fasting, the lack of hunger means that eating becomes a purely wilful and meaningless act.
So, at that point, most ordinary people would definitely give up the inefficient practice of eating for nutrition and instead embrace the efficient practice of absorbing spiritual energy to maintain their bodily functions.
Even if some people might eat to satisfy a craving, they could not possibly stick to three meals a day. Take, for example, a social livestock who often has bland, free lunches at the company cafeteria.
If he already possessed the cultivation of fasting, he would certainly prefer to skip this unappetizing lunch, for without the drive of hunger, eating it served no purpose other than torturing oneself.