one is watching all the readings together which "make sense".
If one reading is out from where it should be relative to the others (for the given load/condition) it is investigated immediately so anomalies don't usually go unnoticed.
One gets a sense.. a feeling for the whole.. like a simulation running in your own head to feel whats going on as well.
It would be better to run a dc circuit throughout a house just for lights and do away with the rectifier circuits inside these led globes and It could be free of transients.
I quit Facebook but was forced to return when it was the only way to communicate with certain Social groups.
So now I use one of my old phones with nothing on it, including no contacts, just for Facebook on a guest wifi channel on home router so it cannot link into main home network.