I think there’s a good argument to be made that lots of companies doing bad things and taking bad risks socialize their failure, thus learning nothing except they can get away with it again on the publics dime. Being too big to fail is an added bonus. How is the public better off in that scenario? Regulation can act as a bandaid but there is always another loophole to exploit.

There could have been a round of modern “trust busting” ala Teddy Roosevelt. Too big to fail is a clear center of too much market power. (That the smaller banks like credit unions weathered that era better underscores the need for some “right sizing”.)