Because going gym, doing dieting, eating clean food this is something like you are fighting with yourself in life, or with your mind. The hardest part to stay fit not going gym, the hardest part is to eat the same food every single day and stay consistent to eat. And one day you will get the result for sure.
I agree with all this, which seems to me to summarize the most important part of your publication, my dear friend.
Each person is different, and it is an individual case that must be treated personally to know what best fits their condition. I believe that the balance between diet and exercise is generally the most indicated.