I dunno. It seems to me like high school math is a pretty decent foundation for understanding many important aspects of the world (derivatives, integrals, etc.).
And I think that one can clearly and substantively “get” and intuitively understand and intelligently work with an amortizing loan without needing to understand whatever level of math is required to comprehend why pressing (g) (12i) on an HP 12c is not an atomically precise representation of of the answer out to the 12th decimal place.
And I think that one can clearly and substantively “get” and intuitively understand and intelligently work with an amortizing loan without needing to understand whatever level of math is required to comprehend why pressing (g) (12i) on an HP 12c is not an atomically precise representation of of the answer out to the 12th decimal place.