This argument just doesn't add up to me.

Regardless of this court order, Apple already has possession of keys that can sign iOS updates to disable security features. So this "master key" already exists.

Meanwhile the government is saying that Apple can delete the tool the moment after the court order is executed, so then what is there to steal?

I just don't get the argument that this tool is any more of a "master key" than the actual "master key" Apple already has.