Capitalism tends to optimize for what we might call "best overall performance".
It's the kind of design principle that goes into the scheduler for Windows desktop O/S. It tends to do the right thing most of the time, and the exceptions don't kill you.
You do NOT want that design philosophy in your brakes or life-support equipment.
What you want there is "guaranteed minimum performance". This is what "real time" operating systems are about.
We need that for critical parts of society, too.