Google only cares about your total review score.

Google considers multiple factors beyond just the total review score when evaluating reviews. While a high overall rating is beneficial, Google also analyzes the recency of reviews, the sentiment expressed within the text, the quantity of reviews, and the diversity of review sources. For example, a business with a 4.5-star rating from 50 recent, detailed reviews is often preferred over a business with a 5-star rating from only 5 old, generic reviews. Therefore, focusing solely on the aggregate score misses crucial aspects of Google's review algorithm.