Largest reasons the big finance has not fully adopted blockchains: the majority of smart contracts are open.
Dusk modifies that using confidential smart contracts contract which runs on a public chain but whose input data is private by default. Businesses are able to directly encode compliance logic (such as who is able to trade what and at what time) and yet preserve confidentiality where it is necessary. In this combination, automation and privacy, but without excluding regulators, is a potent mix.
This marks a fundamental change of financial apps that it transforms coded regulations into binding legal restrictions onchain.