Pragmatism and instant replay
Schwyzer's argument against instant replay is that bad calls are an important part of the sports experience. Instant replay proponents -- of which I would, I suppose, count myself -- want perfect refereeing. The refs are there to make sure the rules are properly applied, so we can watch two teams duke it out within those parameters. So anything that improves the quality of refereeing is a good thing, because it makes sure the game is played properly. Schwyzer, on the other hand, sees dealing with bad calls -- including blown calls that change the outcome of the game -- as a valuable part of sporting.
The question that came to mind for me about Schwyzer's position is: where do you draw the line? It's easy for replay proponents to call for maximizing the accuracy of officiating. But if you value some fallibility, how do you decide how much is enough? It seems suspicious that the optimal quantity of bad calls would be that which is produced by the best human referees acting without external technological aids. Why not shift the balance toward fewer bad calls by allowing instant replay if the cameras are grainy and positioned at bad angles? Why not increase the amount of bad calls by hiring worse refs or impairing them in some way?
A more defensible rationale for drawing the line precisely at banning instant replay would be to see the refs as a third team of athletes. In addition to admiring the skills of the players at moving or stopping the ball, we admire the skills of the refs at getting calls right in the tumult of the game. On this rationale, introducing instant replay is like giving the quarterback a cannon that can hurl the ball with more speed and accuracy than his unaided arm -- it defeats the purpose, since we're watching the game to see people do certain activities, not simply to see those activities get done. This rationale doesn't incorporate Schwyzer's relish of chewing over the feeling of having been wronged by the refs. But perhaps in combination with valuing bad calls as such, it can help justify drawing the line where it's drawn in the "no instant replay" position.
Even this resolution is somewhat unstable, though, because it raises the question of what things count as using the players (and refs') natural capabilities, and what things count as extraneous technological enhancements. Common sense assures us this is an easy line to draw -- but in reality it's highly questionable, especially if you want to try to draw the line without assuming a single model of what a "normal" human capacity is. The line that separates the self from the environment is not a Platonic reality but rather a pragmatic, variable tool. Things get even stickier when you realize that successful operation of a technological enhancement is itself a skill that can be admired -- hence we have both javelin and archery events (and outside of sports, both singers and pianists).
This seems like a good opportunity to apply the pragmatist test -- ask why you want to make the distinction in the first place, and that will tell you what criteria you should use to do it. But at this point we're so deep in the weeds, and so beyond my own passing understanding of sports, for me to know how to begin to answer.