Maybe true but that won't get them a calculus credit on their transcript.
> The reality is for these students, "standard" middle and high school math is mind-numbingly boring.
>The best outcome would be that the best schools and teachers use the surplus time to teach stuff that's off-curriculum like logic, discrete math, stats, programming, etc.
This is also true I was one of these students. My middle school did almost exactly this. They had a per algebra class that explored all sorts of random topics. We did things like clock math, and observed how these other mathematical systems did or did not observe things like the associative property. It was amazing because it made math more than just doing calculations. This class is still one of my fondest educational memories.