God, I used to try to get people with 'cheat days' to understand that. Kind of things fine if it's just about balancing calories over a week. I think fine for people maintaining. But if someone's overweight and trying to change to a healthier diet than essentially resetting their messed up sense of taste every week is the worst thing they could do. It's like no shit they're miserable with healthier options months into some big change. Someone shooting up would be miserable too if they just vastly reduced the amount they were using without ever fully going through withdrawal!