When deleting GitHub repositories, it can be hard to tell if you are on a fork or the base repository as the interface is very similar. This can lead to accidental deletions of base repositories.
To avoid this, the organisation owners should be the only members allowed to delete repositories. Follow these instructions:
See GitHub docs Setting permissions for deleting or transferring repositories
This will ensure that even Admin users cannot accidentally delete or transfer repositories
✅ Figure: 'Allow members to delete or transfer repositories for this organization' is disabled