Whereas the concerns for something like WordPress is
1. Has our website been hacked and publicly defaced?
2. Has our website been silently hacked and is being used to secretly distributing malware or worse, aka the FBI randomly shows up at your business.
3. Will updating one random plugin nuke your entire live site, resulting in multiple sleepless nights? Will not updating it cause your site to get hacked also resulting in sleepless nights?
4. Or better yet something in your underlying environment changes and nukes your site, usually in the middle of a weekend out with your family, and your hosting provider pinky swears they didn't change anything. So you spend your whole weekend investigating just to find out your provider did change something, usually something stupid too.
5. Considering all the above your off-site backup solution is vital so better keep that maintained and thoroughly tested as well.
6. Plus a thousand other reasons to waste time, worry, and lose sleep.