If they have a security team (which I hope they do), I feel bad for them (considering the last few weeks). Probably were under staffed and ignored for a long time and now are under a terrible pressure.
If it consisted of 20 people, I would agree with you: they would still be hackable, but the embarrassing simplicity of the hacks should have been covered.
Without knowing details of the team, it is just an unsubstantiated guess and/or heaping crap on Sony (who, as a company, i can't stand).
I'm surprised the hackers are still going after customer data, and haven't started targeting IP yet.
I'm not excusing Sony: they screwed up big time. I'm simply saying that we can't infer that their security team (if it even exists) is incompetent.