It's a situation where I feel sorry for the animal more so than the person. When situations occur I can only hope that they get the money to save their animal, obviously we're all human and we want them to be ok.
However is frustrating that people allow it to get to this point where they expect other to foot the bill for their emergencies. If you can't afford decent pet insurance you cannot afford a pet. Having a pet is a luxury, not a necessity.
As a general point with anything, if you couldn't afford and deal with anything happening, get it insured. Especially when the amount doesn't have a cap to it.
So here pets can cost A LOT of things go wrong, the amount is almost unlimited, so for the vast majority of people they can't afford to self insure. However say for a top of the range laptop breaking there is a cap to the cost, the price of a replacement, so if you think you can afford to take that risk, then don't get it insured. Just don't ask other people to pay if something happens.
(I changed my example to top of the range laptop, as a basic laptop is an essential these days and not all low income people can afford insurance or a replacement, but as I said before a pet is not a necessity)