I always thought that I should put as many people in the photo as possible in group settings, because more lively energy = better right? but my brother is a tra

I always thought that I should put as many people in the photo as possible in group settings, because more lively energy = better right? but my brother is a trained photographer and he encouraged me to focus on one or two people at most, to create a more interesting photo. it becomes a character study instead of a bunch of people where you don't know where to look.