I think there's a problem with thinking about it as just "maths". Of course ordinary people aren't going to need multivariate calculus every other day of the week, and some topics are deservedly esoteric.

Arithmetic is used by everyone every day. Statistics is used by a lot of people too. Computer science is an oddly named branch of mathematics.

"Mathematics" is a very broad field, although the term is easily misunderstood. It's very easy to think of real-world applications for game theory, graph theory and cryptography. For instance, considering everyone's position in a business deal, or fuzzy optimisation of critical paths when you cook dinner.