A group has an active mailing list, a useful website, and one person who controls every account. If that person disappears for a month, ordinary maintenance can become impossible. Backup ownership makes critical access less dependent on a single individual's availability.
In open-source collaboration, organizational accounts and an additional administrator can keep essential access available when a project leader is absent. The wider principle applies wherever shared work depends on permissions held by one person.
Permission plus understanding
Imagine a neighborhood association whose backup administrator can renew its website domain and update essential contact details. Having an account is only part of readiness: they need to know which services matter, what authority they have, and how to recognize a legitimate request.
More access also creates more responsibility. The arrangement should not require everyone to share one password or give unrestricted powers to anyone who volunteers. Different tasks may need different permissions, and the group still needs to know who has acted.
A nominal backup that has never checked access may fail precisely when needed. The useful arrangement is a real second route for continuity, with current permissions and enough context to use them. It separates the survival of shared infrastructure from the uninterrupted presence of its most dependable organizer.