Reading the response on her post has me shaking my head. I am amazed how many people think that this dive operator will pay to replace all of the gear.
If you can't afford to replace it, you insure it. I do trip insurance sometimes, but it is a rarity. I don't have any of my dive gear covered as it is cheaper to replace than insure unless I lost everything at once. It is covered within my dwelling as a rider in case of a fire. Typically on a trip, I won't have more than $20k worth of gear with me. To cover everything everywhere would cost me in the range of $5k per year last I checked. I come out ahead by not insuring it and assuming the risk.