Very nicely explained. The whole theory of the Ecosystem type Community we have gives a great explanation of how the higher powers work on here and Yes Bots can be Necessary, look at @cheetah, a major factor in fighting spam and plagiarism. I have wrote an article explaining a similar theory, but more aimed towards the Decentralized factor of Steemit.

https://steemit.com/steemit/@ltndd1/decentralized-steemit-and-why-it-works

Great Post.