Jazz
Inactive
The work of historians is extremely relevant when discussing motivations, decisions, and outcomes. Indeed, even reporting numbers around the human toll can be relevant if done objectively.As has been mentioned above, professional historians have tried to make sense of the numbers and arrive at conclusions on the roles of key characters like Hitler and Stalin. In Bloodlands for example, the total has been attributed with twice as many civilians deaths being due to the actions of the Hitler regime in Nazi Germany, than to that of Stalin.
Perhaps you think the work of professional historians is irrelevant, but there are those who accept that their work is valid and has consequences for the modern world.
Splitting hairs as to how many corpses go on who's ledger is petty and not relevant.