Can you expand on why you think performance hacking degrades correctness? As I understand it, “yes” (with no arguments) is supposed to output “y\n” continuously

Can you expand on why you think performance hacking degrades correctness? As I understand it, “yes” (with no arguments) is supposed to output “y\n” continuously until terminated. Throughout/latency are unspecified, admitting various implementations with various concerns, like GNU’s focus on throughout vs BSD’s focus on latency/simplicity. Even an implementation that took 10 seconds between each output could be desirable for some use cases! Is that version of “yes” less correct?