It is good advice - it depends on what direction your ship is heading most of time and whether or not you want the sun coming in your window/door.
Just to clarify - "oceanview" can be either side of the ship. Starboard is the right side of the ship when facing forward, and the other side is called "port."
(Remember port = left, both have four letters).
But just because it is called port it no longer signifies the ship will dock on that side of the ship. I guess it once did (google it) but nowadays a ship can dock equally on either the port or starboard side.