There are many jobs that don’t require a university degree. Why should my child consider studying mathematics beyond year 10 when it is not compulsory?
The workplace is always changing. The job we start in is very likely not the one we will finish in. Market forces and changes in technology mean that some jobs are fading away while new ones are being created. Over a typical fifty year working career people who continually increase their skills and abilities have more opportunities than those who don’t. Learning as much mathematics as you can gives you one way to make the most of opportunities as they arise.