This is what the passive version of this sentence would look like:
The statue of David was sculpted by the famous artist and sculptor Michelangelo in Italy in the early 1500s.
In English, usually the word that is placed in the beginning of a sentence is the most prominent one, and the most important one as well. It is where the emphasis of the sentence is. Having this in mind, the best reason for the writer to revise this sentence to be in the passive voice is to emphasize <u>the statue.</u>
Alloterations have repeated words that rhyme is untrue
Hope this helps and have a wonderful day :)
