I think the banks agree with the decentralization as well. I remember watching a video recently talking about JP Morgan and how they want to create their own stable coin. They did so for 3 reasons: 1) More resistant to being hacked, 2) faster transaction times and less fees and 3) higher interest for users with stable coins. As you can see they see the benefits of tokenization but whether they will allow tokenization of projects and businesses are unknown.
The problem is exchanges is that you have to ensure they will not scam you. Which is why fully decentralized systems need to transparent for people to fully trust them but at the same time, we need to ensure whoever is holding the money (in their own account) also isn't messing with it.