Yes, Promoting your post is perfectly fine but if people promoting an post which don't hold any value or efforts should not be promoted because promotion word is associated with an service which holds something which can provide value so in my opinion Bid Bots before voting any post, there should be validation of posts.
And let's hope that in future we can see posts which can give value to the platform and that is really important because when we want see the growth of the Steem Blockchain and Steemit then we all are representatives and our posts are our Resume so we have to act accordingly.
Wishing you an great day and stay blessed. 🙂