Are you serious? There are so many problems it can prevent, because they are nearly impossible to occur now:
1) People can only act as themselves, they can't log into the database and corrupt all the data in a table, so there is no need to recover from massive systemic corruption (this is the big one)
2) Business rules of smart contracts are enforced, and you know that the state transitions happen exactly as they should (this is the reason that databases use stored procedures, for example)
I can list a few, but there are literally thousands:
1) In an auction, the highest bidder is the one who actually wins, it can't be hacked. You can have N winners, and once the N+1st arrives, it returns the money to the lowest bidder who can bid again. Bids increase at a predictable rate, everyone knows the deal upfront, etc.
As opposed to, say, this on the highest level: https://observer.com/2018/03/christies-sothebys-lawsuits-sho...
2) Salaries can be paid out to specific addresses, at a specific rate, and be approved by managers, with the history of all this preserved
3) Atomic swaps between tokens, escrow, each side knows the money is there and will be released if they do their part
4) Rules about staking reserves, guarantee the money is there for vendors to cash out, vendors must be whitelisted to cash out, etc. etc.
5) Large Communities can enforce their "constitution" and which roles invite which roles, at what rate, etc. Ah here, just look:
https://community.intercoin.app/t/intercoin-defi-communityco...
and so on and so forth