It not though. It's really hard. It's a noble goal but meaningful diet / caloric reductions are difficult. It helps to not be surrounded by low quality affordable choices and to avoid food desert areas if possible.

I remember one study tracking annual caloric intake and I nthink the average person's caloric intake deviated by less than the amount of calories in a single meal from year to year. Fighting these set points that our bodies adapt to early on is a serious challenge.