Depends what you want to achieve.
The rating text box does read:
Your review
Share what you liked or disliked about this project. Our community rules apply here. Reviews are shared with developers and your followers.
And it calls it a review. But unless you have public reviews, probably no one, not even the dev, might read it. If the dev has few ratings, chances are, it will be read.
But if the dev has few ratings, there probably will be few comments as well, and a populated comment section looks always better than a barren one.