Could someone explain this to me? Like I assume lordnacho had expected that guy to apply for a wider category of jobs, but which jobs? And what is the advantage of that broadness?
I think you could do a whole range of things. Anything from quantitative trading to traffic management. Or something that doesn't even require math, like project management.
The advantage of broadness is you have a wider choice about what you do. If one kind of work turns out not to appeal to you, you aren't stuck. That has some economic value as well. If you have the watch industry collapse, you don't have a bunch of watchmakers sitting around on benefits who could be doing something different.
1: Plenty of vocational training takes place at universities and have degree-titles attached to them. That doesn't make them academic pursuits. I say this as a polytech-rebranded-as-"university"-trained engineer and I firmly believe that I shouldn't hold a degree that implies that I have an academic education.