I think more interesting is the landing stations where numerous cables
intersect. They may be diverse in the water, but they cluster around each
other when they hit the landing stations.

Exactly; which have historically been in the same strategic locations. Suez, Singapore, Cape Town; it's the strategic map of the British Empire. "Five strategic keys lock up the world", as Lord Fisher said. (Dover, Gibraltar, Singapore, Cape Town, and Suez).

The similarity is truly uncanny.