I would agree with that.
The key to losing weight and keeping it off IMO pretty much boils down to something as simple as: East Less & Move More.
But more precisely eat less but dont ever starve yourself eat healthier, eat a variety of things, but stay away from the fad diet du jour move more but focus on simple and achievable and sustainable exercise; (especially exercise as simple as just taking a brisk 20 minute walk every day; taking the stairs instead of the elevator where possible; dont always look for the parking space closest to the door, and perhaps adding some simple calisthenics, some light weight training using hand weights but not over doing it, add some simple stretching). Start slow, keep it simple and incorporate little changes over time, but dont make it a chore, but something you actually like doing or at least can tolerate for 10 minutes at a time, maybe only once a week to start.
I have a friend who over the 30 years Ive known her, has constantly been dieting and often trying one fad diet after another. Most recently, only in the last 5 years or so Atkins > the grapefruit diet > vegetarian > vegan > paleo > fasting with juice cleanses > back to being a semi-vegan (she thought she could eat cheese eggs and still be sorta be a vegan) > high fat low or no carbs > no or very low fat and whole and raw foods only > various ethnic food kicks > gluten free and organic. I love her dearly and she is my best friend in the world, shed do anything for me and I for her but since I moved out of state and we dont get to see each other as much anymore, when we get together and go out to eat, its always a challenge to find a place that serves whatever fad diet shes on at the time. But then again, bless her heart, she cheats a lot.
She has had some success with losing weight on some of these diets, but always gains it back and sometimes gains back even more.
She also had gone on several exercise fads, sometimes in combination with a fad diet and sometimes thinking if she exercised a whole lot more, that she could eat anything years ago bought a mini-trampoline and told me it was the greatest thing ever, how I should get one too until she broke her ankle; then it was Zumba and she was going at least 5 times a week until she got bored and sick of it; then it was the very expensive elliptical machine she bought and put in her basement and was using it at least an hour or two every day, that she now uses as a place to hang laundry from. LOL!
The number of exercise machine sitting unused likely matches the number of 1980s computers sold for home education stored in closets or attics.The machine alone isn’t any good without motivation and discipline.