Yeah, Malaria has been taking that death toll every single year, but not many people in the US or Europe seem to give a shit (except for Bill and Melinda Gates).
Even more surprising because heart disease is a major risk factor for a severe outcome in COVID-19, and a significant number of heart disease cases are lifestyle related (and preventable).
For dementia this is explained on this page, and it’s similar with heart disease:
While a person with end-stage dementia may technically die from an infection or other medical complication, it is their severe dementia that predisposed them to that complication and made them too weak to fight it off.
This also will lead to less deaths from these causes in future years for dementia, but depending on extent and severity of the lockdown, heart disease might become an even larger problem.
