The uses of math might not seem immediately useful, but it's like having a tool chest.

And knowing underlying math helps you understand things, and make good decisions. Basic probability in particular is really useful, and can be used for something as simple as estimating the amount of time you need to spend to get some number of drops in a video game. It can also be used to gamble, or to tell if people are cheating while gambling. Or even to predict your test scores before getting them back.

Pure mathematics can be used in cryptography to make sure stuff you send in emails isn't read by anybody who wants to read it.

Matrices can be used to model the spread of disease, among other things, like making sure you don't need to wait for long in a supermarket queue, or displaying objects to your computer screen.

Writing semi-facetious papers dealing with a zombie apocalypse
Math is used to predict the weather.

Used in finance all over the place, a simple example being compound interest.

Figuring out what med students go where.

Physics is well known for using things like group theory.

I think economics uses math like finance does, with stuff like utility functions, and CAPM, which involves linear algebra.

I think there are uses in biology of things called

schemes, and knot theory can be used for dealing with DNA or RNA. I think there are also gene folding simulations that get used for something.

https://en.wikipedia.org/wiki/Mathematical_and_theoretical_biology
I think it's used in chemistry for reactions or something.

It's used in computer science for creating programming languages. Stuff like context-free grammar and lexical analysis.

It's used extensively in game theory, although that goes back to things like economics and linear algebra.

Supply chains use it to figure out when to order a shipment, and how much to order.

Insurance uses math extensively, from figuring out how much to charge, and how much they need to have on hand so they can stay afloat. They do things like modelling their losses and figuring out the probability of catastrophic events occurring.

You use it to figure out how much you need to pay people for stuff, estimating how long it takes to get places, how much food you need to get through the week, and heck, you count when you exercise. How fast are you going? 30mph. How far are you going? 5 miles. It'll take 10 min.

It's not that math isn't useful, it's that math isn't always taught with a specific application in mind.