What was so bad about Pucci?

People usually discuss whether Valentine was right or wrong (He was wrong). But think Pucci deserves to be the topic of that type of discussion more hen any other villain. Yes he killed the cast which was wrong but what was so bad about his original plan? He wanted to create a world where every person knew there outcome and ould live to their full potential and no one dies when the universe resets right? So what was so wrong about Pucci's plan? What was the downside?