[tialaramex]

No, I reject the claim that "my argument" (not in fact mine) says you can't learn an API unless you can see how it's implemented. I don't think that's a remotely plausible reading of what was written. Instead I agree with the claim they actually wrote that since software is intended first and foremost to be read, it makes sense that the standard library, software you'll be using as a programmer should be a positive example and not a horrible distorted mess.