We're seeing more and more studies that fail to find a relationship between LDL cholesterol levels and heart disease. Most likely because there really isn't one.
https://www.healtheuropa.eu/ldl-cholesterol-future-cardiovascular-events/92138/Serum triglyceride levels, on the other hand, are a valid concern with respect to heart disease. Dietary carbohydrates are turned into triglycerides by your liver.