Ask HN: Why are mathematical standards so low? (And what should they be?)

As a control theorist, I'm privileged to have received rigorous training in applied mathematics. In my experience, most real life systems, organizations, and even psychological patterns can be effectively and practically understood in terms of dynamical systems, feedback loops, optimization, etc., to the extent that I strongly feel all people could benefit dramatically from receiving training in applied mathematics, control, and systems theory.

Unfortunately, truly grokking these topics requires significant mathematical maturity (which is often the byproduct of graduate-level mathematics courses). My question is this: Can you imagine a hypothetical education system where students leave secondary school with an advanced-undergraduate level of mathematical maturity? Why or why not? What would such a system have to look like?