What a silly way to view things.
The counterparties didn't think they had no losses.
"Lehman had more thanTHE LEHMAN CASE 200 registered subsidiaries in 21 countries, and the insolvency laws of more than 80 jurisdictions were implicated during the settlement of contracts. To fully settle its OTC derivative obligations, the authorities needed to reconcile the universe of transactions, value each underlying transaction and agree on a net settlement amount. Overall, it was a long and complex process lasting several years that included lawsuits concerning “
egregious and commercially unreasonable” calculation statements by some counterparties."
https://ccp-global.org/the-lehman-case/
As of 2022, Lehman's bankruptcy still hadn't fully resolved. The issue is still ongoing with the SDNY as far as I can see.
And of course you ignored the obvious, Lehman's shareholders lost everything.
People invested in other companies that invested in Lehman also lost substantial amounts of money.
And you ignored the effect on asset prices. The way you are treating it, a bunch of big banks could fail, the stock market could fall by 40% and you would be acting as if no one lost anything because they still have the same number of shares.
That's silly. If the market drops by 40% that is a big deal. I'm not worried about DB because I'm stupid enough to have an account there. I'm worried because just like Lehman, their failure would have a major effect on the markets.