Why Would You Need a Professional Revision Help?
First, the revision process may take as much time as essay writing itself, as you need to approach your paper multiple times in order to find and correct all the problems. Next, you might need to consult the formatting guidelines (for example 6th Edition of the APA formatting guide was recently released) in order to get all the details right. You will have to spend some time checking your referencing, proofreading, and editing your essay.
If you still think that your professor will give you the highest grade simply for the fact that your ideas are brilliant (and regardless of the quality of writing) you are mistaken. You need to submit a perfect paper in order to get the highest grade.