I can see them inspecting multiple miles of lines after the first break.. By the fifth, doubt they’d consider doing that.
The dont really visually inspect the cable. They can tell where the break is almost to the foot through test equipment. Plus most of its buried so they couldnt see it anyway.
I worked in the telecom industry for several years. Not in teh field but in the operations center side of these cuts. There is equipment which can read the signal through the glass but the more dependable just requires them to disconnect the cable and connect it to their device. WOuld be a very short outage which would probably not investigated. The harder issue is actually using the signal and interpreting the data. Much of which is hopefully encrypted.