Maybe... it's a legit argument.
My point is, backup plans are common and necessary. If it's easy, harmless and free... then it's a non brainer. This was a easy and harmless risk mitigation that IMO should have been implemented.
Why do people have insurance? You may not get into an auto accident for 10 years. But when you do, you have insurance for risk management to you and the other party involved.
Why do you backup your computer files? It's rare a hard drive will fail. But if it does, you'll be happy you backed up your files.
Why do buildings have emergency exits, sprinklers, and fire alarms. The building may NEVER have a fire. But if it does, there is risk mitigation implemented.
Why does software and IT systems have disaster recovery implemented? It's very costly and may never get used. Why? Backups for risk mitigation.
Why do elevators have malfunction and error handling implemented? Risk mitigation.
Why does the military implement backup plans on sometimes the simplest of missions? Why do people train their coworkers to do their own job? Risk mitigation incase you are not available whether it's due to injury, vacation, or whatever...
These are ALL examples of backup plans just incase things don't go as planned. Some are costly, time consuming and complicated.
Tomlin could have implemented a very simple backup plan for risk mitigation at zero expense.