Safety factors exist because without them, bridges fall down
The free market ensures that bridges stay up, because the bridge-makers don't want to get sued by people who have died in bridge collapses.
That isn't how safety factors work... The person you're responding to is correct. I encourage you to look it up!
The free market ensures that bridges stay up, because the bridge-makers don't want to get sued by people who have died in bridge collapses.