I can't agree at all with this premise that we don't need to know advanced math. Knowledge of how things move, change, and interact is of practical use all the time. And, being able to understand data and make predictions are important no matter what your job is.
I feel that saying that the usefulness of math is overrated is akin to saying that toilets are overrated. Sure, we got by just fine without them, but in a modern society with a large population, this is a crucially important ingredient for progress.
Understanding gradients is a good example here - it gives you a much more realistic perspective on everything from good real estate deals to good social skills. Gradients are invisible but you can see them everywhere if you have a solid understanding of math. Sure, teaching people how to take tests is overrated, but this is not an indictment of math, no way.