The reason it's so difficult, to almost impossible to get fat on those foods you have listed. Is because you'll become too full to overeat. Not only is it healthier for plethora of reasons. But you'll eat less.
On top of that, if eating for long enough your gut biome will change and you'll start craving whole food.
You must fart a lot with all that fiber in your diet. One of the blessings of switching to a diet that is appropriate for human beings is that your digestive system will operate a lot more smoothly and you'll stop farting so much. You basically never fart on a diet of only red meat. Also, a red-meat-only diet has far more vitamins and other micronutrients than a plant-based diet.
On top of that, if eating for long enough your gut biome will change and you'll start craving whole food.
"yes, plain broccoli for the win"