> When we feel we have it rough recognizing that others may have it rougher lends a perspective that leads to gratitude and less self-centeredness.

Sometimes, for some people. For some people, when they express their feelings, and the response they are met points out that others have it worse, they sometimes feel worse. It can sometimes feel like a dismissal, invalidating their feelings and experiences. I'm using qualifiers here, but I personally think most people want to feel validated.