How does your boat talk to you? How does Link fit so many things in his pockets? Magic!
As for the sailing, it could be pretty fun, but only if you wanted it to be. The sailing itself wasn't really fun, but everything that went along with it could be said as fun. You could at least call it interesting. It could be fun(or interesting, if you prefer) to see a shadow in the distance and have the curiosity to go over to it and discover something new, or to get on those platforms or whatever else in the ocean that could be pretty interesting. You just had to have the curiosity to travel to those shadows in the distance to be able to make the sailing less of a bore than most people think it is.