Well, that's my fault. I wasn't terribly clear.
Put simply, I'm saying that while a strong maths background is useful, it's not essential to be a competent developer, and that there are many instances where a strong math background appears to be essential, but ultimately is not. That second bit frequently misleads developers in to thinking that they're far more numerically literate than they actually are.
No one is disputing that a strong maths background is essential for some domains. That's perfectly obvious. The argument TFA makes is that, for the most part, developers need very little beyond basic arithmetic.
I agree with the author. Though she didn't make her case very well, I can't dispute the conclusion. I also understand that it makes some people uncomfortable, as they believe themselves to have a strong mathematics background simply because they're competent developers. I suspect that this false sense of numeracy that programming offers causes a good bit of harm.