It’s not a crazy idea to group people born around a certain year range together. There’s a lot of shared experiences and often similar outlooks. The boundaries between these groups are a little stupid though.

It’s also a useful tool to understand how global events affect people in different parts of life. Often quoted is a gen z divide that is missing in other generations. I think this was caused because of when covid hit during their lives. A difference of a couple years made a big difference where the younger half leaned hard right and the older half leaned left.