Oversimplified, but not always false. An example would be that eating healthy and exercising is better for you than not doing those things, but won't necessarily fix a problem in itself. Very few things in life can be flicked on and off with a simple choice.

And yes, I agree with MoxieDoxie. There are a lot of articles out there that play to people's want for a simple, fast solution when real change tends to come slowly and people's brains/bodies are different.