There are many reasons why you would want to be able to backup and recover important data and while you hope that you will never have to use the backup and invoke the recovery of lost information, if a problem ever occur you and your organisation could be facing a major problem without a backup. Frankly the cost of the loss of data and the inconvenience will probably outweigh the cost of a backup and recovery system.
For example, if you had hand written a book or an important long document and didn’t make a copy, having to re-write this could take hundreds of hours and it might not be exactly the same, unless you could remember the original document word by word.
If you then replicate this problem across even a very small organisation where there are repositories of data including accounts, sales documents, marketing collateral, customer records as well as other large databases that could be lost or destroyed, it might make it impossible for the company to continue trading.