Backups are meant to safeguard your data. If a backup is not regularly checked to make sure your data is actually being backed up, then how do you know your data is actually safe?
Make sure whatever backup process you are using does some kind of verification, such as:
1. Testing a restore of some data (typically to a temporary location),
2. A comparison between production data and the backups (manually or using a utility),
3. An automatic test of a virtual version of your system being backed up (i.e. Datto) will ensure your data is as safe as you can make it.
As long as verification is being done, your backups can be relied upon to safeguard your data.