Irrelevant. First of all, it's not nearly impossible as premised in that video, a great deal of this country has been on buried cable for decades. My entire town had it in the 60s. Second, it doesn't matter if it costs more because it happens so infrequently.
They have to repair one or more lines servicing my area in Leonardtown on at least a weekly basis. If it storms, there will be several breaks, every time.
The only time I was affected by a power outage due to a "break" when I lived in California, AZ, and Texas was when lighting hit the service box for our subdivision.
I went the entire 8+ years I lived in AZ without a single power outage, at all. No one needed to own/maintain a generator. Here in SOMD it's like the damn philippines, need to have backup power everywhere because you can't rely on the grid for anything critical.