I have made this point many times OrmIrian and to be perfectly honest I don't really buy the 'eat home cooked stuff' as a way of doing this either. Of course home cooked stuff is more nutricious and better for your body all round. However you can be perfectly slim and eat nothing but junk, I know many people like this. They just don't eat much of anything but what they do eat is pretty poor quality.
Being overweight is about eating too much for you body - pure and simple. The quality of what you put in is pretty irrelevant in terms of weight gain or loss (though not of course in terms of longterm health). What counts is the amount of energy you take in against the amount you use.
A programme I watched once on those really morbidly obese people who can't move really made this point come home to me (by that I mean people weighing 40+ stone). They showed a number of these people who had been put on very low calorie diets in hospital. All of course lost a lot of weight.
However the specialist on the programme said that there was a very high rate of failure on this programme of weight loss and that 80-90% of his patients would regain all the weight in a few months after going home and would need probably hospitalisation a second or in some cases a third time to save their lives .
However one of the patients had maintained his loss and in fact continued to lose weight over the period of a year following his discharge from hospital. They showed what he was eating and it was crisps, take-aways etc and very little in the way of 'healthy food. As he said, he still ate the same things - just much less of it.
I'm not advocating this as ideal but for him it was more important to lose weight (even after 18 months of steady weight loss including several months on a hospital diet of 600cals a day, he still weighed 25 stone or so) than to radically change his diet. Ideally he should do both but that was too much for him to manage all in one go so he chose a half-way house.
Most of the others had tried to 'eat healthily' and had all increased in weight again. Some of them had always eaten a lot of healthy food but as the doctor said oranges are healthy but if you eat 25 of them as part of a day's eating you will probably put on weight even if you don't eat much else, and most of these people could eat that may oranges in a day and a lot else beside.