How many people are involved in processing that vast ecosystem of intermediaries? It's a wild amount of inefficiency. Every major city has giant buildings filled with people pushing numbers on spreadsheets to make those products work. They're extremely inefficient. And to interact with those systems, you need to go through a middleman like a brokerage.
I think the analogue is Ally bank, which is known to give the largest returns on savings accounts, currently yielding a whopping 2%. Compare that with a crypto-ecosystem lender like Nexo which is yielding 8-10% on the same asset (USD).
> Sure, you can buy assets that don't have real profit streams attached and lend them to short sellers, but I have no idea why anyone would think that revolution would be a net benefit to them...
That's one of the profit streams my stock broker uses. Why shouldn't it be available to me?
The reason why you don't have access to any of these money-making "institutional" products (like lending stocks, underwriting insurance, or serving as a market-maker) is because they require a lot of administrative overhead. When you replace them with smart contracts, you democratize all of these services.
In a few years, it will be common for people to buy/sell/lend/insure all kinds of assets (physical, virtual, derivatives) from their phone without a middleman.
You can do it today if you're an advanced user with enough money to overcome the currently high transaction costs.