It’s descriptive. Do you want to use paragraphs to name a group of similar people, or a word? " The people born between x and y exhibiting these behaviors and traits, or have been imprinted by these traits, though it is not as strict rule," or “generation x.”
And yes, we are also allowed to critique people based off of these things. It’s how life works. It’s how we grow and change.
Say you make a new invention. Are you going to give it a name, or are you going to use a description each time?
What about if you have kids. Are you going to name your kid a long winded description of their lineage, or something short?