A newbie wouldn't have been capable of doing this. The guy most likely knew what he was doing. In either case, only Parity was affected, so this is pretty much completely irrelevant to Ethereum as a whole.
You're probably right. The fact that ETH represents a system that any amateur, incompetent programmer or hacker can insert executable code into shouldn't matter to anyone.
Which is basically the complete opposite of what you've taken from my post, unless you were being sarcastic and it went over my head...