I one hundred percent concur with this

We think users should be actively engaged in selecting witnesses that they think are doing beneficial things for the Steem blockchain.

Time changes so do the activities of people. Continuous evaluation will help fish out passive witnesses.

This is well explained and the answers provide are enough to douse arguments and confusion.

As regards bid bots, I can't really say much. To everything that has advantage come with some disadvantages as well.

Weldone team