It says "an easy way to explore an ocean monument", but you have to TP, which you can do to find an ocean monument in any world. Also, you say it's really rare for both to generate next to each other, but I'm sure there's a TP location in many seed spots that does this.
/tp @p 1258 75 -1827
/tp @s 1258 75 -1827
/tp @a 1258 75 -1827
/tp 1258 75 -1827