ALL types of fat are broken down into fatty acids and glycerol and the fatty acids and ketones used as fuel in the absence of carbs. Dietary fat included. Fat cannot be stored as fat, only carbs are stored as fat in the presence of insulin, fat does not stimulate an insulin response and hence if not used as fuel is not stored and is excreted. Excess protein, above the body's needs may be converted to a limited amount of glucose, this can be stored if it is not used immediately but this rarely happens. There are actually only 4 types of cells that need glucose so the body can easily do without dietary carbs.
The main constituent of arterial plaque is fibrin, red blood cells, calcium with SOME cholesterol. The cause of the heart disease is damage to the arteries by high levels of insulin or blood glucose, injury, high blood pressure, drugs or smoking, cholesterol is the repair agent. Ever wondered why there is no cholesterol build up in veins even though the same blood flows through them. Excess dietary carbs leads to excess insulin production and hence insulin resistance, that is diabetes 2 and its accompanying obesity, high blood pressure and cancers. 'Normal' eating is in excess.
Ah, Wikipedia, the fount of all incorrect wisdom, can't you do better than that. At 75, I have outlived all my compatriots and colleagues even some relatives who ate 'healthily' and ended up with diabetes, on statins, cancer or all 3. Killed by a combination of bad practice, bad drugs, and propaganda. Here endeth the lesson.