It also explains few of the reasons: lack of focus, timing, different scientific culture.
I'm not exactly understanding why so many people are taking the offense either.
The interviewer asks a very straight forward question multiple times: help the reader how does Oppenheimer ranks in his skills and contributions to other physicists of that era and it does just that.
This is not to say everyone is equal let's all sing kumbaya but if we're discussing classical composers do we really need to rank someone vs Mozart/Bach/Beethoven? It rarely adds anything.
Einstein was probably the most visionary scientist of the whole century at making huge steps forward in several key areas. John von Neumann made landmark achievements across pure maths, physics, engineering, computer science and economics.
To say that a basketball player is not comparable to Larry Bird or to Michael Jordan is no disparagement.
No one is Mozart. All we can control is our disposition and the work ethic of Amadeus' Salieri is worth striving for.
However the notion that Oppenheimer and Salieri were mediocrities because they weren't the best is a bit insulting. If those highly capable and powerful figures in history aren't worth dignity then what about the 99.9% of people that are below their level? Everyone deserves dignity.