The Org Workbench can't create an organization — and creation must sit behind a 'be sure there is no match' gate

The workbench's front door only finds orgs that already exist; there's no way to mint one from the UI. When creation lands, it can't be a bare form — the operator should be shown every plausible existing match (name, slug, alias, domain) and create only past an explicit gate, same discipline as adding a person.