I’m quite disappointed by most comments so far talking about RAID and data loss. That is not what RAID is for at all.
RAID is for uptime/availability. When a drive fails, the system will keep running and working. For companies, that would lose thousands of currency per hour with a downtime, this is super important that the system keeps running. At home, it’s convenience that you can order a new drive and replace without hours of setting up and copying before you can watch the next episode again.
Backups are against data loss. If a single drive fails, a RAID fails or you get some encryption malware or an employee destroys stuff on purpose, then everything is destroyed. It doesn’t matter if it was a single, any RAID, HDD or SSD. You order a new drive, make a new volume and restore the data from your backup.
It’s just a setting like so many other things. You can put in individual IPs you trust or IP ranges.
It seems Plex has figured out lots of Plex ‘server admins’ are just normal Windows users and click OK on everything w/o reading any change logs or checking any settings. So it’s easier and saver to enable a lot of things right away. Admins can just go into settings and adjust it.