That's the number with restrictions, lockdowns, curfews, etc, etc. In other words while Serbia was hit fairly badly, relatively speaking, the mitigation measures largely worked. This is not a good argument against mitigation measures.

The Spanish Flu seems to have similar case mortality rates and efforts to implement preventive measures were hampered by the war time conditions so it's a good candidate to compare against when considering the effectiveness of preventive measures. It's spread lead to from 17x to 50x as many deaths as we've seen from the coronavirus at the global level. In India where lockdown measures weren't significant 5% of the population died.