Formatting boot drive is possible
In a Fedora VM, I was able to format the boot drive (containing the OS).
- Launch GNOME disks
- Select the drive which is the boot drive
- Click the Hamburger menu
- Choose the 'Format Disk' option
- Press format (x2)
- Enter password
Disk has been formatted now. I don't think this action should be possible, as it's dangerous.