Imagine doing research in a specific UX in which half the people hate a specific design aspect (where it's actually completely impossible that this would ever happen in that particular UX). How would you solve that?

Interview question asked to UX Researchers interviewing at Coinbase, Kraken, Instacart and others: Imagine doing research in a specific UX in which half the people hate a specific design aspect (where it's actually completely impossible that this would ever happen in that particular UX). How would you solve that?.