When should I hire someone to audit the whole site instead of using this tool?

Consider a broader review when multiple modules emit conflicting entities, store or price variants disagree, a deployed page differs from the source template, or a Google report needs investigation beyond a snippet. Define the affected templates, examples and acceptance checks first. The useful outcome is a traceable correction to the responsible output owner, followed by rendered-page verification, rather than a promise to reach a particular checker score or search appearance.

References: Google structured-data guidelines.