> not structural or risky behavior from investment banks in 2007

I don't see it that way at all. Over the last couple years, we've seen an explosion in private capital investments, NFT and crypto fads (questionable, but I would argue that these were large enough to be considered structural), greatly increasing home prices, supply chain disruptions, the war in ukraine (and all its knock-on effects). Things are a bit topsy-turvy, and I am hesitant to write off all of these things as "not structural".