This is not about bots, it's about abuse and scam. You may also consider the comments from a bunch of established users here that got much more into detail than I did.
still have same problem with the amount of whales that sell their votes
Amount of whales.. Where do you get these numbers from?
I'm pretty sure SMTs are not invented to encourage vote trading but to strenghthen the overall value of Steem. That's at least what I got from the whitepaper and videos so far.
by the amount of whales is from observations if you check transfers to a few whales that vote a lot you'll see many links with "gifts"
but does it really matter if users buy votes by steem sbd or trading votes is happening everywhere
check trending of #meme #fun #story for easy to see examples of this
didn't say was purpose SMTs were invented for but will allow anyone to sell votes without being seen in transfers