The word "slick" did not come to mind as Tony Hayward, the embattled chief executive of BP, foundered in a sea of congressional questioning this week. Never in the face of righteous political indignation did expertise look so unconvincing and so unworthy of its status. But in many respects Mr. Hayward and BP were simply unlucky: They were caught out by an event they didn't think would happen and then compounded the problem by sounding clueless when asked to explain what went wrong or how they would fix it.

As...