About the number of comments on Amazon


When I see videos on how to find niches in Amazon, I hear people say that there should not be many revisions.
I guess it's somewhat competitive, but I do not see why 1 product with 1500 comments should be more competitive than a product with 245 comments.

Is it simply because, with 1500 comments, the product is very popular and, therefore, very competitive?

Or is there more in those reviews?

Thank you