I'm not sure what ship you're looking at, but it's highly unlikely that it's been 5 years since she was in dry dock.
When a ship goes to dry dock it doesn't mean everything on the ship is being refurbed and redone, unless there's a massive change planned for the ship. They deal with maintenance and updates they can't do at sea mostly.
So, unless it's a major dry dock, most areas of the ship will be maintained as they go.
I once sailed on a ship the last week she was sailing for that company, having been sold. Now that's when some maintenance issues were left undone... waiting for the new owners