I'll grant you that some have a tendency to accidents,
but basically I consider insurance a scam. It's generally expensive considering what little it pays for. It would be one thing if it were $29.99 for two years, but it's not. The price in most cases seems rather stiff considering that all you get is a few hundred dollars in the worst case scenario. A couple of years ago, T-Mobile tried to get me to take what would have amounted to almost $200 in insurance costs for two years on a device that was worth about $400 new. That's not a good deal to me. (p.s. T-mobile jump does come with insurance as a default, i.e., they always try to sell it, but I'm pretty sure it's not mandatory.)
I suppose one day I will have an accident with a $500 device 3 weeks after I bought it and it won't be covered by warranty and yikes. But it hasn't happened yet and I go back a long way with smartphones. If an accident, otoh, happens 19 months after purchase--well, I'm close to a new device then anyway. It's already depreciated a lot. And it may not happen at all. I calculate the odds and the cost of insurance. I think overall I'd have to be really unlucky to get banged. And if I get unlucky once, it won't happen often. The insurance savings on the next phone will make it up.
To date, I'd say the money I've saved on insurance clearly has paid for a couple of devices over the years. If at some point it evens out a bit, the overall result still ain't bad. If you tend to be a little more, um, accident prone, your mileage may differ.