I think there is also an argument for general numeracy as a life skill. Lots of people I run into just have no intuitive sense of how numbers work and how to calculate roughly.

The number of people that cannot calculate a tip in their head, or have a basic grasp of how interest works is constantly shocking to me. Yeah, we all carry calculators around, but you should be able to reason about numbers enough to know when an entry error has been made on a calculator