Simply saying "Eat fewer calories" is technically correct and completely useless in practice. People simply can't do it no matter how hard they try. You could a

Simply saying "Eat fewer calories" is technically correct and completely useless in practice. People simply can't do it no matter how hard they try. You could as well tell C programmers to solve their security problems by not putting memory access errors in their code. Framing it as a moral failure does not actually help solve the problem.