You're completely right, but like I said, the problem is not with the service offering it the problem is on the site of the person voting for it.

Let's say I have someone who upvotes each one of my posts, I can decide to go two ways:

• I can feel motivated and only post quality content to live up to the auto upvote (good for the platform)
• I can try to post as much as I can even if sometimes it ends up mediocre (bad for the platform)

If the first case happens, this is very good for Steemit since an automatic upvote can motivate the people to do better.
In the second case, it is the duty of the person who set up the automatic vote to remove the auto vote until the quality of the content lived up to the amount of the vote.