What in the world are you talking about? That's the entire point of blockchains, to have immutable records. And short of forking the blockchain or breaking the underlying encryption, there's literally no way to transfer a DNS record (in a world using DNS built on top of a blockchain) without the private key.
> what in the world are you talking about
rebuking the implicit, "ergo this method is bad" part of your post, given its context. more specifically, the idea that its worse than current methods with DNS and X.509