You're right, sorry. Most typos should be fixed now. I made the translation into English in a rush and didn't think of running it through a spellcheck beforehand. Thanks for reminding me!
As explained in the text: the point isn't that these problems aren't solved by blockchain, they're amplified. E.g.: scams existed without blockchain, but now they're forever and permanently engraved into the blockchain. Code was always flawed, but now a bug isn't just a bug, it's a bug in a smart contract with potentially disastrous consequences that can never be properly fixed.