I think it's a publication bias thing. Because so much was written about these people in their day, they become mascots for the time period. And what they did, while objectionable, is impressive. They had a massive influence on recorded history.
My own theory is that there is so much written in these times because of the massive inequality then. Books, statues, etc are expensive. In times of ecomonic equality, especially before the press, people would be less likely to waste time and resources on such things. Thats money better spent on improving their and their communities lives. But when you have massive inequality and a narcisist in charge, you get books, statues, and massive projects dedicated to the men who can afford them.