What are the benefits of low cholesterol?

Vascular disease: Low cholesterol is beneficial in that it reduces long term vascular inflammation and injury which are the hallmarks of atherosclerosis that can lead to heart attacks, strokes, and peripheral arterial disease.

LDL, not Cholesterol: Cholesterol is a fat molecule manufactured by every animal cell, a building block of each cell membrane (enables membrane fluidity/movement without tearing), is fundamental to the survival of every animal cell. Lipoproteins (proteins which transport all fats in the water outside cells) is the correct issue for artery disease (e.g. Ldl ≤700 nmol/l, HDL ≥45 µmol/l). Cholesterol ↓$, but misleading.