The exclusion zone from a worst case accident in onshore wind can be measured in meters/hour over a day or two.

For offshore, worst case would be whatever the ship was carrying which foundered into the array.

He does have half a point about the economics, but we already have a track record of lowering prices significantly as the technology matures, unlike...

Though, while there have been no documented cases yet, we are all afraid that one of the offshore turbines will get jealous of the one-horned goats the onshore turbines get to eat, and will spring his mooring and run to shore, hungrily sweeping civilization aside in his quest to eat and destroy.

I'm certain the producers of Godzilla would green-light this.

"Life shrinks or expands in proportion to one's courage." - Anaïs Nin