we know that the market for oil products didn’t suffer as a result of the break-up of Standard Oil, nor did anarchy descend on the US telecommunications markets following the break-up of AT&T. I think you’ll actually find that there is a decent case to be made that things got better in both cases, with more robust and innovative markets and better value for customers.
But the most important long-term reason to consider government intervention in the size and power of the world’s largest financial institutions is that failing to do so will inevitably starve one of the key sectors of the economy of innovation and progress with increasingly damaging results.