"In type 2 diabetes, the pathogenesis of atherosclerosis-related disease is multifactorial (Betteridge, 2011). Glycaemic control has been consistently shown to prevent microvascular complications. However, large, randomised trials have failed to demonstrate the same consistent beneficial effects of intensive glycaemic control on improving cardiovascular outcomes. Thus, optimal glucose control in isolation is not sufficient to reduce cardiovascular risk" https://www.pcdsociety.org/download/resource/2070
Edited to try and correct link.