The reason is it is so easy to transact directly with the blockchain, and there is nothing to stop the bots. We can use many programs, i.e. steempy which I was working with today, they are set up with python and so it makes programming easier! It is not all that bad, just shifts the money around. If I were you I would not worry about them, and just concentrate on creating more good content! Because u used the bot it helped trend your post so I got to read your post and learn, so there is benefit. If no bot, none of these interactions may have occurred. Heres the rule, if you work hard on your post generally it will be accepted by most of the community if you use bidbits. No worries, Im not really going after anyone, I realized there is a pro and a con to everything. The truth is I am totally into bots, emersed, I work on programming bots 12 hours every day minimum! That is why I went bot crazy, I became over saturated!
See heres an example how easy it is to get steem info right from my terminal.

2019-06-09 14:59:17 ☆ nickademous in ~
± |master ↑1 ↓2 S:387 U:367 ?:474 ✗| → steempy importaccount coininstant
Account Passphrase:
Importing active key!
Passphrase:
Importing posting key!
Importing memo key!

So as you can see from here I can now vote, post, downvote, automate with a robot programmed all in my terminal! All the bidbot does is take the memo and vote for a post in the memo after a payment. A bidbot is boiled down to a few lines of code in reality these days and anybody an operate one!

Update, Use beempy instead of steempy! Beempy is all working!!