Science, Technology, Engineering, Computing, Business and Finance - these are just some of the fields which depend very heavily on Maths. There are many more.
It involves logical thinking and analysis of complex situations. It deals with both abstract and concrete concepts. Even if somebody has no intention of working in an obviously Maths-related field, these are skills worth developing.
We live in a world where many things can be understood from a Mathematical perspective. A basic level of Mathematical awareness helps us make sense of much that is going on around us.
Seriously, for many of us the subject is inherently fascinating. That alone makes it worth studying.