Why a page of its own for single-handed offshore sailors?

For every part on board there is a backup. Or two. Your head is a one-off.

Seven headsails, two autopilots, a windvane self-steering gear on top of that, and for every other part a backup for the backup. A hand bearing compass, and in extremis a sextant. And the only thing on board that exists just once is your head. Alone, nobody contradicts you: what the navigator would correct or the bow would report runs through to execution unchecked. On top of that comes sleep deficit, which attacks your judgement first, and does so before you notice it has gone.