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Sheets can only be hidden if they are included in a dashboard or a story.
Similarly dashboards can only be hidden if they were included in a story.
Story can't be made hidden.
i'd recommend creating a story tab & dump all ur unwanted sheets & dashboards into it, to hide them once for all.
I think logically hiding all tabs wont be possible. Because it would need a "Sheet1" to be able to displays the tableau interface.