Aim of Article: highlight the importance of assessing Cost to Benefit ratio of any change
The final principle is the simple but often overlooked idea of assessing the cost to benefit ratio of any dietary change, and aiming to alter the factors that have the biggest benefit for the smallest cost first. This sounds simple, but avoiding analysis-paralysis is a common problem.
It makes little sense to invest in an advanced/expensive supplement that might give you an extra 1-2% improvement while you are still not drinking enough water and are way off with your Macros.
Or attempting to help a chronically stressed, sleep deprived, and obese person with their elevated high blood pressure by focusing on cutting salt out of diet. There is of course a well established link between excess salt consumption and high blood pressure, but compared to the other factors that have a far bigger impact on blood pressure, it makes little sense to focus so much energy on this factor until the bigger factors have been taken care of.
Take Home Message: Prioritise the big-basics (simple factors with biggest change) first