He may be brilliant, but he played fast and loose without real testing or concern, so I wouldn't call him the "most competent". For a wallet contract they knew would secure many millions of dollars, there should have been dozens of people auditing it before rolling out to users.
Charlie is trolling. The architect isn't going to be the best craftsman, that requires very different set of skills.
Parity devs may be academically brilliant, and they put out a fantastic client, but the wallet issue shows how lax their development lifecycle has been.
I can't edit my post above to add this now, but looks like Charlie retracted this as Gavin was the original author, but not the one who made the mistake.