Neighbor noise can be an issue depending on location, but many of us write it off because we currently live in cities and find that neighbor noise is not a problem and is not something we care about given how minor of an event it is when we do experience it at all.
I suspect that your experiences and expectations may differ from others in this thread. What are your expectations and experiences in this area?
I dealt with neighbor noise in 3/5 apartments I rented.
It is why I will _never_ share walls again.
What you're really saying is that you are a person who is not bothered by neighbor noise. That's fine, you've self-selected into an environment where tolerating that is necessary. You should realize that most people find neighbor noise to be a stressor, especially as they get older.
Also, as an aside, everyone I know who below the top economic tier and lives in SF _commonly_ complains about neighbor noise. I think you might just be insensitive to it.
I suspect that your experiences and expectations may differ from others in this thread. What are your expectations and experiences in this area?