Why is it that those with bid-bots already received their support?

When a person delegates their SP to a bot, they are thus supporting themselves. It does not interact with the community or other authors. Also, it has a guaranteed reward, which does not encourage writing a good post. So, such a person cares only about earnings, not interaction. She clearly understands that she is delegating a certain amount of SP and will receive a certain amount of rewards for it. This is purely an investment activity that has nothing to do with creativity. Supporting yourself is like masturbating.

Will you not upvote those who delegate to a community and receive upvotes in return either since this is exactly the same method used.

Communities usually set a certain minimum that must be delegated. For example, I delegated 10,000 SP to the Ukrainian community so that it could develop. This allows me to get 100% upvote. But I don't need to delegate all my 63000. I use the rest for manual curation. I think the difference is noticeable. In addition, community contributors are usually very active with other contributors and support many posts.

Steem is a great place where everyone can do as they like. If you want to vote for posts that are voted by bid bots, you are free to do so. I don't want to do that, and I also have the right to do so, even if the curator status is taken away from me.