Because no one has reported them.
To his defense the report says it violates the community guidelines but the guidelines haven’t been updated in a while and do not contain anything rating/comment related.
So unless you read this forum there’s no way to know as of jan 24th.
And that report clearly is abusing the report system. Reporting a 4/5 star review for misinformation? From Aneopsy? A notorious thief, spammer and copycat.
Also @kevyn_3D is well within his right to not add a text as it is required for ratings at/below 3 stars