ah but if you eat right you can do that and lose weight.
My old job I was on my feet all day, lifting heavy loads constantly.( i could carry 120lbs a quarter mile, walk back and do it again) I usually had a large lunch, minimal breakfast and dinner. I gained on average 1-2 pounds a year, after 15 years though that adds up.
I moved changed jobs and diet.
I know sit in an office for 8 hours a day. I walk maybe 500meters on the average day. I still eat a minimal breakfast, but lunch is now a yogurt, and maybe a snack bar if I get hungry in the afternoon. Dinner is usually a salad and small portion of chicken/steak/ etc).
I have been steadily losing weight with that switch.
it is why most diets fail. because you change up you diet hard, and the week after the diet ends you return to eating the same portions/foods you were before. Change you diet long term and watch the pounds stay off.