This “war on math” only affects public schools, and among public school kids, only whose parents don’t have the knowledge or money to seek outside courses.
So it really makes the math education even less equitable than before. Complete opposite of their stated goal.
These people need to go to jail for ruining a whole generation of kids with less means. Shameful!
When I went to high school in the 70’s kids were doing trig and logs by the 9th grade. Algebra was 7th grade stuff. Later would come differential calculus, then integral calculus. The brainiacs in “A” lane math, which I doubt even exists anymore, were doing those Lagranians that blew my mind before they graduated.
Math teaches reasoning and problem solving skills. Useful even if the math itself isn’t used.
Also useful to determine if someone (or government entity) is trying to hoodwink you. You just have a better understanding of how the world works. Lots of primary education is like that. Who uses their geography or their history?
Anecdotally from bloggers here, such skills can’t be taught I realize some people who have taken fairly advanced maths have poor understanding of basic maths.
Lagrangian is mostly taught as a recipe for constrained optimization without explaining why it works. It can be taught in a lesson or two after multivariable differentiation.
Geometry teaches a more valuable skill than algebra and all the other high school math classes. Geometry demands students to write down their reasoning. In that sense it’s the only “real” math class in high school. Students actually need to prove things.
There are some simple mental models I learned in math that I regularly use in everyday life. For example in math there is this proof technique that pushes some quantities to extremes, look at their behavior there and later say at non-extreme situations behavior is qualitatively similar. I sometimes use the same technique to reason about non math stuff.