I found this by dr fung and look at that, seems we were all right about something. I think this applies to the thread because it could also be good info for the OP.
“The practical implication is this. If you are lean and leptin sensitive, then eating more dietary fat, like cheese, will not make you gain weight. However, if you are trying to lose weight, and have some problem with obesity/ insulin/ leptin resistance, then adding extra fat to your meals is NOT a good idea. Once again, you can see that we do not need to go back to that outdated, and useless notion of calories. Obesity is a hormonal, not a caloric, imbalance.
What can you do instead? Well, eating more carbs is not a good idea. Neither is eating more protein. Nor is eating more fat. So, what is left? That’s what we call fasting.
At this point, you might worry about nutrient deficiency. That is why so many people talk about nutrient density. How can you get the maximum nutrients for the minimum calories? This is muddled thinking. Why do I care? Ask yourself this – are you worried about treating obesity or nutrient deficiency? If you choose obesity, then worry about obesity. You don’t need more nutrients, you need less. Less of everything.”
So seems like it’s not a great idea for everyone to throw caution to the wind when it comes to fat consumption unless you are metabolically fit. I don’t think a newbie needs to focus on fasting, but telling them that eating over energy needs even with fat can cause weight gain is not horrible advice.