I am surprised that undersea cables are not impacted more by adverse actions. Maybe its because of the depth of the water that makes them harder to access. But as the report states once the cables come on land they represent a singe point of failure for many locations.
The resilience of multi path networks lessens the impact of a single cable failure. But there are limits.
https://www.recordedfuture.com/research/submarine-cables-face-increasing-threats