Wells Fargo/BoA are "too big to fail" institutions in the United States.
They got significant back hand, handshake deals, from Washington institutions to not only stay afloat, but for hundreds of little issues.
In essence, the FDIC is a well crafted "redistribution," of all the under the table benefits Wells/BoA get from lobbying the Feds, to the smaller banks.
The US has a deep interest in keeping its smaller banks alive.
I can say, in Australia, the small business lending market is hugely overvalued due to monopolist price gouging by a handful of large institutions.
In Canada, I'm told the situation is similar. Costs to small business are immensely higher than the United States.
Banks similar to Silicon Valley Bank are essential because they undercut BoA, and prevent the "Canada" situation.
Unfortunately, SVB blew its top off. But the system itself is good.