I generally disagree. Ideally, sportsmanship is be about appreciating the limits of human abilities. In that sense, the line between competition amongst others and oneself is blurred. Is it so hard to believe that people can compete against each other and also be supportive at the same time? It reminds me of the moon landing and the shared feeling that we, as humans achieved it, not necessarily just the US in its arms face against the Soviets.
I think that's what I said, but your summary is more pithy.