Earlier quoted context omitted.
These are depositors of a bank. Most startups only have one bank. Startups should live or die because they create good products and solve real problems in real markets, not because they made an arbitrary choice like which bank they started using. There's also a real risk of bank contagion if it is only safe to deposit in the largest banks.
There was nothing arbitrary about that choice. This bank promised better deals BECAUSE they were not careful enough about the risk it entailed. That was their competitive advantage, and they made bank for it. Well, tough luck, now it's not anymore: it has nothing to do with being a large bank or a small bank, it has to do with healthy business practices.
To be fair though, in the US we've long established an expectation that if you have funds in a bank account at a registered bank, the government would back those funds
It's stupid to have set that expectation, but it seems very destructive to suddenly remove that expectation