I will try my best to reflect every point and back it with sources:
High colestorol foods are not problematic. Correct. But having high level of cholestorol in the blood has negative effects on health.
https://www.health.harvard.edu/heart-health/high-cholesterol-hypercholesterolemia-a-to-z :
"High levels of LDL cholesterol are linked to atherosclerosis, which is the accumulation of cholesterol-rich fatty deposits in arteries. This can cause arteries to narrow or become blocked, slowing or stopping the flow of blood to vital organs, especially the heart and brain. Atherosclerosis affecting the heart is called coronary artery disease, and it can cause a heart attack. When atherosclerosis blocks arteries that supply blood to the brain, it can cause a stroke."
