Even if you add the ability to filter, it won't help unless it's the default. You'll still have a huge number of buyers choosing the product due to fake reviews

Even if you add the ability to filter, it won't help unless it's the default. You'll still have a huge number of buyers choosing the product due to fake reviews and driving up the sales numbers. Since they aren't the smartest shoppers, they're also likely to leave their own review and be influenced by the other 5 star reviews.