I take your point, but the pandemic is different from the economy as a whole†, with different incentives. It is probably possible to keep society running with total indifference to COVID-19, pretending that its death toll is essentially the same as a bad flu. Over a million people would die, but society can metabolize a million deaths without really skipping a beat.
Preventing as many of those deaths as is reasonably possible requires sacrifice and expenditure, and really the only incentive we have to undertake that is moral.
I don't think the problem is that "blood on their hands" is moralizing, but rather that it's hackneyed, shrill, and unpersuasive.
Sorry that you don't like my writing style. Next time I will rephrase "have blood on their hands" as: "have committed manslaughter through their wilful negligence in dealing with the pandemic back in March when it was obviously going to start killing people".
Really, I don't think it's hackneyed or shrill to decry so many deaths. Unless you also think memorializing the September 11 terrorist attacks is also hackneyed and shrill.
Preventing as many of those deaths as is reasonably possible requires sacrifice and expenditure, and really the only incentive we have to undertake that is moral.
I don't think the problem is that "blood on their hands" is moralizing, but rather that it's hackneyed, shrill, and unpersuasive.
† cf downthread