Hey man, I was a fat ass with high cholesterol and pre diabetic. I ate keto and cut most carbs from my diet (20mg max a day) and not only did I lose 60lb, my arthritis and back pain disappeared. My cholesterol is at an acceptable levels without medication.
Sugars and carbs are what is unhealthy. Not meats and fats.
Fructose consumed by real fruits is good.
Fruits are pretty good because they contain important micronutrients and fibre. But the fructose they contain is still just sugar, and not a whole lot better in its own right than the sugar in lollies and biscuits.