yes, as steem blockchain is a proof of brain, authors put time and brain to create content, but no one can get rewarded by the blockchain itself, must someone to upvote this content (curators), and needs a curator whit a lot of steem power to get value !! so curators with a lot of steem power looking just for profit by delegating to bidbots and vote sellers systèmes!!!
i think that steem will lose the attractivity whit time if we can't find a solution for :
1- curation value based on steem power
2- bid bots
3- bid bots curation rewards

My idea :
1-community must elect curators (vote systèm like witness), a curator must read and evaluate articles daily and upvote the good ones and downvote bad content, good curators must get vote and calcification​ and reputation from the community​...
2- bid bots must guarantee​ 25 % profit for Buyers
3- bid bots can't take curation