Because it's functions the same way as a lottery. Most are paying in, not getting anything in return. People who have a lot of money to promote and fake upvotes get to the top, and skim from there. People who make art, music, writing things that aren't get-rich-on-steem posts ... they get left out in the cold, and it' the dead opposite of the draw in the first place. It just further illustrates a societal illness.