It makes no sense for every business owner (and a business doesn't have to be very big to have more than $250K in the bank) to have to spread their funds across multiple banks and do ongoing due diligence across each bank's investment activities.
We're talking about farmers, used car dealerships, builders, and countless other kinds of businesses who would suddenly be expected to develop an aptitude for financial hedging and risk assessment. It would be incredibly inefficient and make it not worthwhile for many people to be in business at all.
The whole point of a regulated financial system is that regular depositors can expect that if the regulations are being met and the regulators are verifying that the banks are in good shape, you can trust that your funds will be safe.
The right response to this situation is to change the guaranteed limit for corporate bank accounts, and, sure, increase the fees that banks (and indirectly, corporate banking customers) pay for that. The wrong response would be to tank the entire banking system to stick it to the tech bros.