The weight classes used to be round numbers, but they changed them all up or down a couple kilo in 1992 after a doping scandal in order to reset all the records.
And then they did the same thing in 1997, for the same reason.
And then they did the same thing in 2018, for the same reason.
It's very silly, but I guess it means we get more world record attempts?
The fundamental problem I have with all of this kind of analysis is that it treats democracy as a tool for finding the median set of ideas amongst a population of people with ideas, and that the “most democratic” system would enact the idea of each idea set that is most tolerable to the most number of people. This is the ur-liberalism.
Politics is the process by which society’s scarce resources (commodities, nature, leisure, whatever) are allocated between people with competing interests. A just outcome would require negotiation between representatives of affinity groups, however composed and however determined, weighted somehow by the size of each group and the impact upon them. Matters of popular opinion just fundamentally are not the problem of politics, and the Condorcet criterion is only good for finding the least unpopular opinion.
I honestly think there’s just no way to make a single-seat election just or democratic in any meaningful way. Multi-member districts are better, since at least you might elect representatives from multiple affinity groups.