Yes but you don’t know what other faults may be introduced when trying to fix the first one. “X is broken. X is fixed. But while fixing X, Y is accidentally br

Yes but you don’t know what other faults may be introduced when trying to fix the first one. “X is broken. X is fixed. But while fixing X, Y is accidentally broken” is a common accident pattern. Unlike in software, you can’t just roll back to a last known good configuration. Every modification carries a risk.