That statistic is about cocaine related deaths, not necessarily overdoses. Often with cocaine related deaths the user is taking multiple drugs at once, usually opiates, and often alcohol too, but it usually doesn’t get blamed.

This is also more a problem with prohibition then cocaine itself since people don’t know the dose of what there getting or adulterants. If it were legal like alcohol there would be far less deaths. There were far more deaths from alcohol under prohibition when your “whiskey” was full of methanol and industrial alcohol

Also overdose isn’t the only danger from drugs. One that alcohol is miles ahead of every other drug is DUI, which kills about 13,000, meanwhile cocaine, by itself, is rarely implicated in DUI. Alcohol impairs your driving ability way more than cocaine. There’s also chronic health concerns, which are harder to weigh. Alcohol is a carcinogen and chronic use fucks up your liver, meanwhile cocaine will fuck up your heart.