I am in favor of more nuclear power and I know very little about the field, but this argument never resonated with me.
If the Chernobyl series paints a reasonably realistic image of what could have happened had they not contained the melt down, we are talking "better part of a continent being uninhabitable for thousands of years". When that is the potential risk, comparing death counts from non-catastrophic scenarios isn't what we should be looking at.
It's not a realistic risk.
Chernobyl was absolute worse case. A massive reactor, with no containment structure (it was essentially in a shed), with a flammable solid state moderator, and no passive cooling. Yet, Europe is not uninhabitable today, infact the above-natural-background radiation in Europe is almost entirely coming from burning fossil fuels, not from Chernobyl.
But given current installation base, it's like 3x more deaths per unit energy than wind.