If I were to check the weather report on a typical day where I live I would probably see that the air pressure is something like 101kPa. I understand that this has been normalized to sea-level.
In fact, the city I live in, being situated on the Canadian shield, is roughly at 1000m altitude. In reality, I am subjected to a value that is much closer to about 90kPa. Why doesn't it make sense to report that number in the weather report? What is the logic behind normalizing it to 101?
How does this make sense to you and I as regular citizens who want to know what I will experience if I step outside?