>You can imagine it being like if a farmer had a bunch of grain stored in a silo and it somehow went bad.
It's fundamentally different, practically the opposite.
Paper losses are like a farmer realizing that the grain in his silo is bad. Knowing this when you were oblivious before is a good thing, whereas the grain going bad is obviously not.
Once you start regarding bad news as a loss, very bad stuff happens. In some contexts, we'd all agree. "Shooting the messenger" is an age-old cliche for counterproductive use of power, right?
Just saying that $X billion dollars were "lost" by market price fluctuation is dangerous, because it suggests it can be weighed numerically against real things and real peoples' lives lost.
If you were a CEO or a politician or someone powerful, would you justify destroying one warehouse or home or hurting one person, in order to avoid, say, a trillion dollar "loss" of paper value in some assets?
I mean, don't you think people do this, directly or indirectly, and it's wrong?
Stock market declines are called "corrections" for a reason.
>The money spent on that commercial real estate is gone. Those big fancy buildings will have been wasted resources and effort.
Maybe, but nobody can say for certain what the world will look like in 5, 10, 20, 50 years anyhow.