It's a good point Steve, just like insurance. I hate paying exorbitant premiums but am always grateful that I did for the rare circumstance, where I need to make a claim.

Running checks on your database is insurance against loss of profit or even loss of the entire business. If you hope that your db is not corrupted and it is, you may also find that your backups are corrupt as well.

So ask yourself what impact total data loss will have on your business. If the impact is trivial then maybe you don't need to worry.