It just seems like if you rally under the flag of justice, meaning to improve the condition of the world, you also attract people who are interested in retribution and punishment (another element of justice).
Lots of middle-class activists for justice, for example, don't actually seem like most of the poor very much (understandable: the poor are a basket of useful idiot deplorables). They're more motivated by their hatred for the rich, and punishing someone is still justice, even if that won't actually improve the material conditions of the poor (which isn't that big a problem, because some of them are trump voters and we still have to punish them).
Lots of middle-class activists for justice, for example, don't actually seem like most of the poor very much (understandable: the poor are a basket of useful idiot deplorables). They're more motivated by their hatred for the rich, and punishing someone is still justice, even if that won't actually improve the material conditions of the poor (which isn't that big a problem, because some of them are trump voters and we still have to punish them).