I think there's a distinct difference between eating three meals a day of fried an other high fat foods than eating three meals a day that are balanced and nutritious.
Granted I originally gained weight from medications and yes, at that time, I tended to eat more because the medications slowed down my metabolism and also made me feel hungrier.
I still think that fat in food can make you more fat than eating light and trying to eat low calorie, low fat food. Overall what makes someone fat is a disproportionate amount of calories to the amount of calories that one burns throughout the day.
That means that if you're extremely active, you should consume more calories than someone who is sedentary.
Thing is you can have a higher fat diet by eating avocados and coconuts than someone who eats lots of fries and be much healthier and thinner...I know sedentary vegans who eat 2-3 avocados a day...lots of olive oil and a bunch of other fatty nuts and seeds yet appear very healthy...this is far more fat than the normal overweight person who eats vegan junk or non vegan who eats non vegan junk