If by following you mean eating exactly the same amounts then yes it would obviously be silly. But you can follow someones diet by taking the core concepts; hi

If by following you mean eating exactly the same amounts then yes it would obviously be silly. But you can follow someones diet by taking the core concepts; higher protein intake, moderate caloric deficit, increased activity, and make fantastic results after you tailor it to your individual needs by figuring out your caloric maintenance (by tracking food and being weight stable over a period of time not by punching your age and height into a calculator)