It may be easy to make the mistake that a majority perspective is the correct one.
I recall a conversation where an evangelical Christian was making an appeal to faith, saying Christianity has millions of members, why is it that there are so many?
An answer such as because they’re stupid is still an acceptable possibility, it entails nothing of the truth of the matter what a majority believes.
A similar worry is voiced by Appiah on an article on the x-phi movement. Studies that quantify the opinions of what people think about moral situations do not really settle the truth of the matter, or what is actually morally relevant. Quantifying what people think about moral situations and their moral calculus is an interesting empirical fact, from which we may derive interesting sociological observations, but what it adds takes a lot more explanation to reach the level of ought propositions.
Furthermore, if a majority deem someone to be the finest artist or best musician, it is really the test of time as to whether they are an ephemeral and temporamous popularity, or if their appeal has anything that is close to universality.