Many things in electrical and building codes aren't that risky to break one at a time, but they all contribute to safety by eliminating possible hazards.
You're right that temporary protective grounding protects power workers from inadvertent energization, but that is primarily to protect from sources of hazardous energy that can't be isolated (like lightning or induction from parallel lines). Temporary grounding can fail too (improper application, bad jumper, an accident severs the earth connection after the job begins, etc) so we provide multiple levels of protection instead of relying on just one thing to keep people safe.
Electrical systems need to be stupid proof because although you might be smart, the next person who comes along won't be. I agree that improper use of a home generator is unlikely to injure someone, but the job as electrical engineers is to think of unlikely but hazardous things and prevent them from happening.
You're right that temporary protective grounding protects power workers from inadvertent energization, but that is primarily to protect from sources of hazardous energy that can't be isolated (like lightning or induction from parallel lines). Temporary grounding can fail too (improper application, bad jumper, an accident severs the earth connection after the job begins, etc) so we provide multiple levels of protection instead of relying on just one thing to keep people safe.
Electrical systems need to be stupid proof because although you might be smart, the next person who comes along won't be. I agree that improper use of a home generator is unlikely to injure someone, but the job as electrical engineers is to think of unlikely but hazardous things and prevent them from happening.