You can choose to hold money in multiple banks. There are services that will happily set up laddered CDs across many institutions for you to diversify exposure and maximize insurance.
To use your tortured analogy: if my neighbor's house burned down, and he didn't buy fire insurance... I would be sad, but I don't exactly think it's my problem (or the government's) to pay to make him whole.
> If startups were going under because it turns out that they were pointless and there was no market, and they ran out of runway… then sure.
I know we all like to believe we control our own destiny. Tiny little inconsequential-seeming choices wobble startups between success and failure every single day. Having a good product is such a tiny piece of it all.